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href="/wiki/C%E1%BB%95ng_th%C3%B4ng_tin:N%E1%BB%99i_dung_ch%E1%BB%8Dn_l%E1%BB%8Dc"><span>Nội dung chọn lọc</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/%C4%90%E1%BA%B7c_bi%E1%BB%87t:Ng%E1%BA%ABu_nhi%C3%AAn" title="Xem trang ngẫu nhiên [x]" accesskey="x"><span>Bài viết ngẫu nhiên</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/%C4%90%E1%BA%B7c_bi%E1%BB%87t:Thay_%C4%91%E1%BB%95i_g%E1%BA%A7n_%C4%91%C3%A2y" title="Danh sách thay đổi gần đây trong wiki [r]" accesskey="r"><span>Thay đổi gần đây</span></a></li><li id="n-bug_in_article" class="mw-list-item"><a href="/wiki/Wikipedia:B%C3%A1o_l%E1%BB%97i_b%C3%A0i_vi%E1%BA%BFt"><span>Báo lỗi nội dung</span></a></li> </ul> </div> </div> <div id="p-wikipedia-interaction" class="vector-menu mw-portlet mw-portlet-wikipedia-interaction" > <div class="vector-menu-heading"> Tương tác </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-wikipedia-helppage" class="mw-list-item"><a href="/wiki/Wikipedia:S%C3%A1ch_h%C6%B0%E1%BB%9Bng_d%E1%BA%ABn"><span>Hướng dẫn</span></a></li><li id="n-aboutsite" class="mw-list-item"><a href="/wiki/Wikipedia:Gi%E1%BB%9Bi_thi%E1%BB%87u"><span>Giới thiệu Wikipedia</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wikipedia:C%E1%BB%99ng_%C4%91%E1%BB%93ng" title="Giới thiệu dự án, cách sử dụng và tìm kiếm thông tin ở đây"><span>Cộng đồng</span></a></li><li id="n-wikipedia-villagepump" class="mw-list-item"><a href="/wiki/Wikipedia:Th%E1%BA%A3o_lu%E1%BA%ADn"><span>Thảo luận chung</span></a></li><li id="n-wikipedia-helpdesk" class="mw-list-item"><a href="/wiki/Wikipedia:Gi%C3%BAp_s%E1%BB%AD_d%E1%BB%A5ng_Wikipedia"><span>Giúp sử dụng</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="//vi.wikipedia.org/wiki/Wikipedia:Liên_lạc"><span>Liên lạc</span></a></li><li id="n-upload" class="mw-list-item"><a href="/wiki/Wikipedia:Tr%C3%ACnh_t%E1%BA%A3i_l%C3%AAn_t%E1%BA%ADp_tin"><span>Tải 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name="title" value="Đặc_biệt:Tìm_kiếm"> </div> <button class="cdx-button cdx-search-input__end-button">Tìm kiếm</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Công cụ cá nhân"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Giao diện"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page's font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" 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mw-list-item user-links-collapsible-item"><a data-mw="interface" href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_vi.wikipedia.org&uselang=vi" class=""><span>Quyên góp</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=%C4%90%E1%BA%B7c_bi%E1%BB%87t:M%E1%BB%9F_t%C3%A0i_kho%E1%BA%A3n&returnto=T%E1%BB%91c+%C4%91%E1%BB%99+v%C5%A9+tr%E1%BB%A5+c%E1%BA%A5p+2" title="Bạn được khuyến khích mở tài khoản và đăng nhập; tuy nhiên, không bắt buộc phải có tài khoản" class=""><span>Tạo tài khoản</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=%C4%90%E1%BA%B7c_bi%E1%BB%87t:%C4%90%C4%83ng_nh%E1%BA%ADp&returnto=T%E1%BB%91c+%C4%91%E1%BB%99+v%C5%A9+tr%E1%BB%A5+c%E1%BA%A5p+2" title="Đăng nhập sẽ có lợi hơn, tuy nhiên không bắt buộc. [o]" accesskey="o" class=""><span>Đăng nhập</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Thêm tùy chọn" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Công cụ cá nhân" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Công cụ cá nhân</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Bảng chọn thành viên" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_vi.wikipedia.org&uselang=vi"><span>Quyên góp</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=%C4%90%E1%BA%B7c_bi%E1%BB%87t:M%E1%BB%9F_t%C3%A0i_kho%E1%BA%A3n&returnto=T%E1%BB%91c+%C4%91%E1%BB%99+v%C5%A9+tr%E1%BB%A5+c%E1%BA%A5p+2" title="Bạn được khuyến khích mở tài khoản và đăng nhập; tuy nhiên, không bắt buộc phải có tài khoản"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Tạo tài khoản</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=%C4%90%E1%BA%B7c_bi%E1%BB%87t:%C4%90%C4%83ng_nh%E1%BA%ADp&returnto=T%E1%BB%91c+%C4%91%E1%BB%99+v%C5%A9+tr%E1%BB%A5+c%E1%BA%A5p+2" title="Đăng nhập sẽ có lợi hơn, tuy nhiên không bắt buộc. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Đăng nhập</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Trang dành cho người dùng chưa đăng nhập <a href="/wiki/Tr%E1%BB%A3_gi%C3%BAp:Gi%E1%BB%9Bi_thi%E1%BB%87u" aria-label="Tìm hiểu thêm về sửa đổi"><span>tìm hiểu thêm</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/%C4%90%E1%BA%B7c_bi%E1%BB%87t:%C4%90%C3%B3ng_g%C3%B3p_c%E1%BB%A7a_t%C3%B4i" title="Danh sách các sửa đổi được thực hiện qua địa chỉ IP này [y]" accesskey="y"><span>Đóng góp</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/%C4%90%E1%BA%B7c_bi%E1%BB%87t:Th%E1%BA%A3o_lu%E1%BA%ADn_t%C3%B4i" title="Thảo luận với địa chỉ IP này [n]" accesskey="n"><span>Thảo luận cho địa chỉ IP này</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Trang Web"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Nội dung" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Nội dung</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">chuyển sang thanh bên</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">ẩn</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Đầu</div> </a> </li> <li id="toc-Xem_thêm" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Xem_thêm"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Xem thêm</span> </div> </a> <ul id="toc-Xem_thêm-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Tham_khảo" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Tham_khảo"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Tham khảo</span> </div> </a> <ul id="toc-Tham_khảo-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Liên_kết_ngoài" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Liên_kết_ngoài"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Liên kết ngoài</span> </div> </a> <ul id="toc-Liên_kết_ngoài-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Nội dung" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Đóng mở mục lục" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Đóng mở mục lục</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Tốc độ vũ trụ cấp 2</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Xem bài viết trong ngôn ngữ khác. Bài có sẵn trong 73 ngôn ngữ" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-73" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">73 ngôn ngữ</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-als mw-list-item"><a href="https://als.wikipedia.org/wiki/Fluchtgeschwindigkeit" title="Fluchtgeschwindigkeit – Tiếng Đức (Thụy Sĩ)" lang="gsw" hreflang="gsw" data-title="Fluchtgeschwindigkeit" data-language-autonym="Alemannisch" data-language-local-name="Tiếng Đức (Thụy Sĩ)" class="interlanguage-link-target"><span>Alemannisch</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B3%D8%B1%D8%B9%D8%A9_%D8%A7%D9%84%D8%A5%D9%81%D9%84%D8%A7%D8%AA" title="سرعة الإفلات – Tiếng Ả Rập" lang="ar" hreflang="ar" data-title="سرعة الإفلات" data-language-autonym="العربية" data-language-local-name="Tiếng Ả Rập" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Velocidat_d%27escape" title="Velocidat d'escape – Tiếng Aragon" lang="an" hreflang="an" data-title="Velocidat d'escape" data-language-autonym="Aragonés" data-language-local-name="Tiếng Aragon" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Velocid%C3%A1_d%27escape" title="Velocidá d'escape – Tiếng Asturias" lang="ast" hreflang="ast" data-title="Velocidá d'escape" data-language-autonym="Asturianu" data-language-local-name="Tiếng Asturias" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/%C4%B0kinci_kosmik_s%C3%BCr%C9%99t" title="İkinci kosmik sürət – Tiếng Azerbaijan" lang="az" hreflang="az" data-title="İkinci kosmik sürət" data-language-autonym="Azərbaycanca" data-language-local-name="Tiếng Azerbaijan" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Kelajuan_lepas" title="Kelajuan lepas – Tiếng Indonesia" lang="id" hreflang="id" data-title="Kelajuan lepas" data-language-autonym="Bahasa Indonesia" data-language-local-name="Tiếng Indonesia" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Halaju_lepas" title="Halaju lepas – Tiếng Mã Lai" lang="ms" hreflang="ms" data-title="Halaju lepas" data-language-autonym="Bahasa Melayu" data-language-local-name="Tiếng Mã Lai" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AE%E0%A7%81%E0%A6%95%E0%A7%8D%E0%A6%A4%E0%A6%BF%E0%A6%AC%E0%A7%87%E0%A6%97" title="মুক্তিবেগ – Tiếng Bangla" lang="bn" hreflang="bn" data-title="মুক্তিবেগ" data-language-autonym="বাংলা" data-language-local-name="Tiếng Bangla" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%94%D1%80%D1%83%D0%B3%D0%B0%D1%8F_%D0%BA%D0%B0%D1%81%D0%BC%D1%96%D1%87%D0%BD%D0%B0%D1%8F_%D1%81%D0%BA%D0%BE%D1%80%D0%B0%D1%81%D1%86%D1%8C" title="Другая касмічная скорасць – Tiếng Belarus" lang="be" hreflang="be" data-title="Другая касмічная скорасць" data-language-autonym="Беларуская" data-language-local-name="Tiếng Belarus" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%94%D1%80%D1%83%D0%B3%D0%B0%D1%8F_%D0%BA%D0%B0%D1%81%D1%8C%D0%BC%D1%96%D1%87%D0%BD%D0%B0%D1%8F_%D1%85%D1%83%D1%82%D0%BA%D0%B0%D1%81%D1%8C%D1%86%D1%8C" title="Другая касьмічная хуткасьць – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Другая касьмічная хуткасьць" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%92%D1%82%D0%BE%D1%80%D0%B0_%D0%BA%D0%BE%D1%81%D0%BC%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0_%D1%81%D0%BA%D0%BE%D1%80%D0%BE%D1%81%D1%82" title="Втора космическа скорост – Tiếng Bulgaria" lang="bg" hreflang="bg" data-title="Втора космическа скорост" data-language-autonym="Български" data-language-local-name="Tiếng Bulgaria" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Velocitat_d%27escapament" title="Velocitat d'escapament – Tiếng Catalan" lang="ca" hreflang="ca" data-title="Velocitat d'escapament" data-language-autonym="Català" data-language-local-name="Tiếng Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/%C3%9Anikov%C3%A1_rychlost" title="Úniková rychlost – Tiếng Séc" lang="cs" hreflang="cs" data-title="Úniková rychlost" data-language-autonym="Čeština" data-language-local-name="Tiếng Séc" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Undvigelseshastighed" title="Undvigelseshastighed – Tiếng Đan Mạch" lang="da" hreflang="da" data-title="Undvigelseshastighed" data-language-autonym="Dansk" data-language-local-name="Tiếng Đan Mạch" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Paokiirus" title="Paokiirus – Tiếng Estonia" lang="et" hreflang="et" data-title="Paokiirus" data-language-autonym="Eesti" data-language-local-name="Tiếng Estonia" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%A4%CE%B1%CF%87%CF%8D%CF%84%CE%B7%CF%84%CE%B1_%CE%B4%CE%B9%CE%B1%CF%86%CF%85%CE%B3%CE%AE%CF%82" title="Ταχύτητα διαφυγής – Tiếng Hy Lạp" lang="el" hreflang="el" data-title="Ταχύτητα διαφυγής" data-language-autonym="Ελληνικά" data-language-local-name="Tiếng Hy Lạp" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Escape_velocity" title="Escape velocity – Tiếng Anh" lang="en" hreflang="en" data-title="Escape velocity" data-language-autonym="English" data-language-local-name="Tiếng Anh" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Velocidad_de_escape" title="Velocidad de escape – Tiếng Tây Ban Nha" lang="es" hreflang="es" data-title="Velocidad de escape" data-language-autonym="Español" data-language-local-name="Tiếng Tây Ban Nha" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Liberiga_rapido" title="Liberiga rapido – Tiếng Quốc Tế Ngữ" lang="eo" hreflang="eo" data-title="Liberiga rapido" data-language-autonym="Esperanto" data-language-local-name="Tiếng Quốc Tế Ngữ" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Ihes-abiadura" title="Ihes-abiadura – Tiếng Basque" lang="eu" hreflang="eu" data-title="Ihes-abiadura" data-language-autonym="Euskara" data-language-local-name="Tiếng Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B3%D8%B1%D8%B9%D8%AA_%DA%AF%D8%B1%DB%8C%D8%B2" title="سرعت گریز – Tiếng Ba Tư" lang="fa" hreflang="fa" data-title="سرعت گریز" data-language-autonym="فارسی" data-language-local-name="Tiếng Ba Tư" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Vitesse_de_lib%C3%A9ration" title="Vitesse de libération – Tiếng Pháp" lang="fr" hreflang="fr" data-title="Vitesse de libération" data-language-autonym="Français" data-language-local-name="Tiếng Pháp" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Luas_%C3%A9alaithe" title="Luas éalaithe – Tiếng Ireland" lang="ga" hreflang="ga" data-title="Luas éalaithe" data-language-autonym="Gaeilge" data-language-local-name="Tiếng Ireland" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Velocidade_de_escape" title="Velocidade de escape – Tiếng Galician" lang="gl" hreflang="gl" data-title="Velocidade de escape" data-language-autonym="Galego" data-language-local-name="Tiếng Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%ED%83%88%EC%B6%9C_%EC%86%8D%EB%8F%84" title="탈출 속도 – Tiếng Hàn" lang="ko" hreflang="ko" data-title="탈출 속도" data-language-autonym="한국어" data-language-local-name="Tiếng Hàn" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D4%B5%D6%80%D5%AF%D6%80%D5%B8%D6%80%D5%A4_%D5%BF%D5%AB%D5%A5%D5%A6%D5%A5%D6%80%D5%A1%D5%AF%D5%A1%D5%B6_%D5%A1%D6%80%D5%A1%D5%A3%D5%B8%D6%82%D5%A9%D5%B5%D5%B8%D6%82%D5%B6" title="Երկրորդ տիեզերական արագություն – Tiếng Armenia" lang="hy" hreflang="hy" data-title="Երկրորդ տիեզերական արագություն" data-language-autonym="Հայերեն" data-language-local-name="Tiếng Armenia" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%AA%E0%A4%B2%E0%A4%BE%E0%A4%AF%E0%A4%A8_%E0%A4%B5%E0%A5%87%E0%A4%97" title="पलायन वेग – Tiếng Hindi" lang="hi" hreflang="hi" data-title="पलायन वेग" data-language-autonym="हिन्दी" data-language-local-name="Tiếng Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Brzina_osloba%C4%91anja" title="Brzina oslobađanja – Tiếng Croatia" lang="hr" hreflang="hr" data-title="Brzina oslobađanja" data-language-autonym="Hrvatski" data-language-local-name="Tiếng Croatia" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Velocit%C3%A0_di_fuga" title="Velocità di fuga – Tiếng Italy" lang="it" hreflang="it" data-title="Velocità di fuga" data-language-autonym="Italiano" data-language-local-name="Tiếng Italy" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%9E%D7%94%D7%99%D7%A8%D7%95%D7%AA_%D7%9E%D7%99%D7%9C%D7%95%D7%98" title="מהירות מילוט – Tiếng Do Thái" lang="he" hreflang="he" data-title="מהירות מילוט" data-language-autonym="עברית" data-language-local-name="Tiếng Do Thái" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%B5%E0%B2%BF%E0%B2%AE%E0%B3%8B%E0%B2%9A%E0%B2%A8_%E0%B2%B5%E0%B3%87%E0%B2%97" title="ವಿಮೋಚನ ವೇಗ – Tiếng Kannada" lang="kn" hreflang="kn" data-title="ವಿಮೋಚನ ವೇಗ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="Tiếng Kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%9B%E1%83%94%E1%83%9D%E1%83%A0%E1%83%94_%E1%83%99%E1%83%9D%E1%83%A1%E1%83%9B%E1%83%9D%E1%83%A1%E1%83%A3%E1%83%A0%E1%83%98_%E1%83%A1%E1%83%98%E1%83%A9%E1%83%A5%E1%83%90%E1%83%A0%E1%83%94" title="მეორე კოსმოსური სიჩქარე – Tiếng Georgia" lang="ka" hreflang="ka" data-title="მეორე კოსმოსური სიჩქარე" data-language-autonym="ქართული" data-language-local-name="Tiếng Georgia" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%95%D0%BA%D1%96%D0%BD%D1%88%D1%96_%D0%BA%D0%BE%D1%81%D0%BC%D0%BE%D1%81%D1%82%D1%8B%D2%9B_%D0%B6%D1%8B%D0%BB%D0%B4%D0%B0%D0%BC%D0%B4%D1%8B%D2%9B" title="Екінші космостық жылдамдық – Tiếng Kazakh" lang="kk" hreflang="kk" data-title="Екінші космостық жылдамдық" data-language-autonym="Қазақша" data-language-local-name="Tiếng Kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Celeritas_fugae" title="Celeritas fugae – Tiếng La-tinh" lang="la" hreflang="la" data-title="Celeritas fugae" data-language-autonym="Latina" data-language-local-name="Tiếng La-tinh" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Otrais_kosmiskais_%C4%81trums" title="Otrais kosmiskais ātrums – Tiếng Latvia" lang="lv" hreflang="lv" data-title="Otrais kosmiskais ātrums" data-language-autonym="Latviešu" data-language-local-name="Tiếng Latvia" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Antrasis_kosminis_greitis" title="Antrasis kosminis greitis – Tiếng Litva" lang="lt" hreflang="lt" data-title="Antrasis kosminis greitis" data-language-autonym="Lietuvių" data-language-local-name="Tiếng Litva" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Kozmikus_sebess%C3%A9g" title="Kozmikus sebesség – Tiếng Hungary" lang="hu" hreflang="hu" data-title="Kozmikus sebesség" data-language-autonym="Magyar" data-language-local-name="Tiếng Hungary" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%92%D1%82%D0%BE%D1%80%D0%B0_%D0%BA%D0%BE%D1%81%D0%BC%D0%B8%D1%87%D0%BA%D0%B0_%D0%B1%D1%80%D0%B7%D0%B8%D0%BD%D0%B0" title="Втора космичка брзина – Tiếng Macedonia" lang="mk" hreflang="mk" data-title="Втора космичка брзина" data-language-autonym="Македонски" data-language-local-name="Tiếng Macedonia" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%AA%E0%B4%B2%E0%B4%BE%E0%B4%AF%E0%B4%A8_%E0%B4%AA%E0%B5%8D%E0%B4%B0%E0%B4%B5%E0%B5%87%E0%B4%97%E0%B4%82" title="പലായന പ്രവേഗം – Tiếng Malayalam" lang="ml" hreflang="ml" data-title="പലായന പ്രവേഗം" data-language-autonym="മലയാളം" data-language-local-name="Tiếng Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%AE%E0%A5%81%E0%A4%95%E0%A5%8D%E0%A4%A4%E0%A4%BF%E0%A4%B5%E0%A5%87%E0%A4%97" title="मुक्तिवेग – Tiếng Marathi" lang="mr" hreflang="mr" data-title="मुक्तिवेग" data-language-autonym="मराठी" data-language-local-name="Tiếng Marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Ontsnappingssnelheid" title="Ontsnappingssnelheid – Tiếng Hà Lan" lang="nl" hreflang="nl" data-title="Ontsnappingssnelheid" data-language-autonym="Nederlands" data-language-local-name="Tiếng Hà Lan" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikipedia.org/wiki/%E0%A4%AA%E0%A4%B2%E0%A4%BE%E0%A4%AF%E0%A4%A8_%E0%A4%B5%E0%A5%87%E0%A4%97" title="पलायन वेग – Tiếng Nepal" lang="ne" hreflang="ne" data-title="पलायन वेग" data-language-autonym="नेपाली" data-language-local-name="Tiếng Nepal" class="interlanguage-link-target"><span>नेपाली</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E8%84%B1%E5%87%BA%E9%80%9F%E5%BA%A6" title="脱出速度 – Tiếng Nhật" lang="ja" hreflang="ja" data-title="脱出速度" data-language-autonym="日本語" data-language-local-name="Tiếng Nhật" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Unnslipningshastighet" title="Unnslipningshastighet – Tiếng Na Uy (Bokmål)" lang="nb" hreflang="nb" data-title="Unnslipningshastighet" data-language-autonym="Norsk bokmål" data-language-local-name="Tiếng Na Uy (Bokmål)" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Unnsleppingsfart" title="Unnsleppingsfart – Tiếng Na Uy (Nynorsk)" lang="nn" hreflang="nn" data-title="Unnsleppingsfart" data-language-autonym="Norsk nynorsk" data-language-local-name="Tiếng Na Uy (Nynorsk)" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Velocitat_de_liberacion" title="Velocitat de liberacion – Tiếng Occitan" lang="oc" hreflang="oc" data-title="Velocitat de liberacion" data-language-autonym="Occitan" data-language-local-name="Tiếng Occitan" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Ikkinchi_kosmik_tezlik" title="Ikkinchi kosmik tezlik – Tiếng Uzbek" lang="uz" hreflang="uz" data-title="Ikkinchi kosmik tezlik" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Tiếng Uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%87%E0%A8%B8%E0%A8%95%E0%A9%87%E0%A8%AA_%E0%A8%97%E0%A8%A4%E0%A9%80" title="ਇਸਕੇਪ ਗਤੀ – Tiếng Punjab" lang="pa" hreflang="pa" data-title="ਇਸਕੇਪ ਗਤੀ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="Tiếng Punjab" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D8%A7%D8%B3%DA%A9%DB%8C%D9%BE_%D9%88%D9%84%D8%A7%D8%B3%D9%B9%DB%8C" title="اسکیپ ولاسٹی – Western Punjabi" lang="pnb" hreflang="pnb" data-title="اسکیپ ولاسٹی" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-pms mw-list-item"><a href="https://pms.wikipedia.org/wiki/Andi_d%27evasion" title="Andi d'evasion – Piedmontese" lang="pms" hreflang="pms" data-title="Andi d'evasion" data-language-autonym="Piemontèis" data-language-local-name="Piedmontese" class="interlanguage-link-target"><span>Piemontèis</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Pr%C4%99dko%C5%9B%C4%87_ucieczki" title="Prędkość ucieczki – Tiếng Ba Lan" lang="pl" hreflang="pl" data-title="Prędkość ucieczki" data-language-autonym="Polski" data-language-local-name="Tiếng Ba Lan" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Velocidade_de_escape" title="Velocidade de escape – Tiếng Bồ Đào Nha" lang="pt" hreflang="pt" data-title="Velocidade de escape" data-language-autonym="Português" data-language-local-name="Tiếng Bồ Đào Nha" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Vitez%C4%83_cosmic%C4%83" title="Viteză cosmică – Tiếng Romania" lang="ro" hreflang="ro" data-title="Viteză cosmică" data-language-autonym="Română" data-language-local-name="Tiếng Romania" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%92%D1%82%D0%BE%D1%80%D0%B0%D1%8F_%D0%BA%D0%BE%D1%81%D0%BC%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0%D1%8F_%D1%81%D0%BA%D0%BE%D1%80%D0%BE%D1%81%D1%82%D1%8C" title="Вторая космическая скорость – Tiếng Nga" lang="ru" hreflang="ru" data-title="Вторая космическая скорость" data-language-autonym="Русский" data-language-local-name="Tiếng Nga" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B7%80%E0%B7%92%E0%B6%BA%E0%B7%9D%E0%B6%9C_%E0%B6%B4%E0%B7%8A%E2%80%8D%E0%B6%BB%E0%B7%80%E0%B7%9A%E0%B6%9C%E0%B6%BA" title="වියෝග ප්‍රවේගය – Tiếng Sinhala" lang="si" hreflang="si" data-title="වියෝග ප්‍රවේගය" data-language-autonym="සිංහල" data-language-local-name="Tiếng Sinhala" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Escape_speed" title="Escape speed – Simple English" lang="en-simple" hreflang="en-simple" data-title="Escape speed" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/%C3%9Anikov%C3%A1_r%C3%BDchlos%C5%A5" title="Úniková rýchlosť – Tiếng Slovak" lang="sk" hreflang="sk" data-title="Úniková rýchlosť" data-language-autonym="Slovenčina" data-language-local-name="Tiếng Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Ube%C5%BEna_hitrost" title="Ubežna hitrost – Tiếng Slovenia" lang="sl" hreflang="sl" data-title="Ubežna hitrost" data-language-autonym="Slovenščina" data-language-local-name="Tiếng Slovenia" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%AE%DB%8E%D8%B1%D8%A7%DB%8C%DB%8C%DB%8C_%DA%BE%DB%95%DA%B5%DA%BE%D8%A7%D8%AA%D9%86" title="خێراییی ھەڵھاتن – Tiếng Kurd Miền Trung" lang="ckb" hreflang="ckb" data-title="خێراییی ھەڵھاتن" data-language-autonym="کوردی" data-language-local-name="Tiếng Kurd Miền Trung" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%94%D1%80%D1%83%D0%B3%D0%B0_%D0%BA%D0%BE%D1%81%D0%BC%D0%B8%D1%87%D0%BA%D0%B0_%D0%B1%D1%80%D0%B7%D0%B8%D0%BD%D0%B0" title="Друга космичка брзина – Tiếng Serbia" lang="sr" hreflang="sr" data-title="Друга космичка брзина" data-language-autonym="Српски / srpski" data-language-local-name="Tiếng Serbia" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Brzina_osloba%C4%91anja" title="Brzina oslobađanja – Tiếng Serbo-Croatia" lang="sh" hreflang="sh" data-title="Brzina oslobađanja" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Tiếng Serbo-Croatia" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Pakonopeus" title="Pakonopeus – Tiếng Phần Lan" lang="fi" hreflang="fi" data-title="Pakonopeus" data-language-autonym="Suomi" data-language-local-name="Tiếng Phần Lan" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Flykthastighet" title="Flykthastighet – Tiếng Thụy Điển" lang="sv" hreflang="sv" data-title="Flykthastighet" data-language-autonym="Svenska" data-language-local-name="Tiếng Thụy Điển" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%B5%E0%AE%BF%E0%AE%9F%E0%AF%81%E0%AE%AA%E0%AE%9F%E0%AF%81_%E0%AE%A4%E0%AE%BF%E0%AE%9A%E0%AF%88%E0%AE%B5%E0%AF%87%E0%AE%95%E0%AE%AE%E0%AF%8D" title="விடுபடு திசைவேகம் – Tiếng Tamil" lang="ta" hreflang="ta" data-title="விடுபடு திசைவேகம்" data-language-autonym="தமிழ்" data-language-local-name="Tiếng Tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-kab mw-list-item"><a href="https://kab.wikipedia.org/wiki/Tazzla_n_teslullit" title="Tazzla n teslullit – Tiếng Kabyle" lang="kab" hreflang="kab" data-title="Tazzla n teslullit" data-language-autonym="Taqbaylit" data-language-local-name="Tiếng Kabyle" class="interlanguage-link-target"><span>Taqbaylit</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%C4%B0ken%C3%A7e_%C4%9F%C3%A4l%C3%A4mi_tizlek" title="İkençe ğälämi tizlek – Tiếng Tatar" lang="tt" hreflang="tt" data-title="İkençe ğälämi tizlek" data-language-autonym="Татарча / tatarça" data-language-local-name="Tiếng Tatar" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%AA%E0%B0%B2%E0%B0%BE%E0%B0%AF%E0%B0%A8_%E0%B0%B5%E0%B1%87%E0%B0%97%E0%B0%AE%E0%B1%81" title="పలాయన వేగము – Tiếng Telugu" lang="te" hreflang="te" data-title="పలాయన వేగము" data-language-autonym="తెలుగు" data-language-local-name="Tiếng Telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%84%E0%B8%A7%E0%B8%B2%E0%B8%A1%E0%B9%80%E0%B8%A3%E0%B9%87%E0%B8%A7%E0%B8%AB%E0%B8%A5%E0%B8%B8%E0%B8%94%E0%B8%9E%E0%B9%89%E0%B8%99" title="ความเร็วหลุดพ้น – Tiếng Thái" lang="th" hreflang="th" data-title="ความเร็วหลุดพ้น" data-language-autonym="ไทย" data-language-local-name="Tiếng Thái" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Kurtulma_h%C4%B1z%C4%B1" title="Kurtulma hızı – Tiếng Thổ Nhĩ Kỳ" lang="tr" hreflang="tr" data-title="Kurtulma hızı" data-language-autonym="Türkçe" data-language-local-name="Tiếng Thổ Nhĩ Kỳ" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%94%D1%80%D1%83%D0%B3%D0%B0_%D0%BA%D0%BE%D1%81%D0%BC%D1%96%D1%87%D0%BD%D0%B0_%D1%88%D0%B2%D0%B8%D0%B4%D0%BA%D1%96%D1%81%D1%82%D1%8C" title="Друга космічна швидкість – Tiếng Ukraina" lang="uk" hreflang="uk" data-title="Друга космічна швидкість" data-language-autonym="Українська" data-language-local-name="Tiếng Ukraina" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%A7%D8%B3%DA%A9%DB%8C%D9%BE_%D9%88%D9%84%D8%A7%D8%B3%D9%B9%DB%8C" title="اسکیپ ولاسٹی – Tiếng Urdu" lang="ur" hreflang="ur" data-title="اسکیپ ولاسٹی" data-language-autonym="اردو" data-language-local-name="Tiếng Urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E9%80%83%E9%80%B8%E9%80%9F%E5%BA%A6" title="逃逸速度 – Tiếng Quảng Đông" lang="yue" hreflang="yue" data-title="逃逸速度" data-language-autonym="粵語" data-language-local-name="Tiếng Quảng Đông" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E9%80%83%E9%80%B8%E9%80%9F%E5%BA%A6" title="逃逸速度 – Tiếng Trung" lang="zh" hreflang="zh" data-title="逃逸速度" data-language-autonym="中文" data-language-local-name="Tiếng Trung" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q166530#sitelinks-wikipedia" title="Sửa liên kết giữa ngôn ngữ" class="wbc-editpage">Sửa liên kết</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Không gian tên"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2" title="Xem bài viết [c]" accesskey="c"><span>Bài viết</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Th%E1%BA%A3o_lu%E1%BA%ADn:T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2" rel="discussion" title="Thảo luận về trang này [t]" accesskey="t"><span>Thảo luận</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Thay đổi biến thể ngôn ngữ" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Tiếng Việt</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Giao diện"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2"><span>Đọc</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&veaction=edit" title="Sửa đổi trang này [v]" accesskey="v"><span>Sửa đổi</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&action=edit" title="Sửa đổi mã nguồn của trang này [e]" accesskey="e"><span>Sửa mã nguồn</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&action=history" title="Các phiên bản cũ của trang này [h]" accesskey="h"><span>Xem lịch sử</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Công cụ trang"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Công cụ" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Công cụ</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Công cụ</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">chuyển sang thanh bên</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">ẩn</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Thêm tùy chọn" > <div class="vector-menu-heading"> Tác vụ </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2"><span>Đọc</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&veaction=edit" title="Sửa đổi trang này [v]" accesskey="v"><span>Sửa đổi</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&action=edit" title="Sửa đổi mã nguồn của trang này [e]" accesskey="e"><span>Sửa mã nguồn</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&action=history"><span>Xem lịch sử</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Chung </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/%C4%90%E1%BA%B7c_bi%E1%BB%87t:Li%C3%AAn_k%E1%BA%BFt_%C4%91%E1%BA%BFn_%C4%91%C3%A2y/T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2" title="Các trang liên kết đến đây [j]" accesskey="j"><span>Các liên kết đến đây</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/%C4%90%E1%BA%B7c_bi%E1%BB%87t:Thay_%C4%91%E1%BB%95i_li%C3%AAn_quan/T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2" rel="nofollow" title="Thay đổi gần đây của các trang liên kết đến đây [k]" accesskey="k"><span>Thay đổi liên quan</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/%C4%90%E1%BA%B7c_bi%E1%BB%87t:Trang_%C4%91%E1%BA%B7c_bi%E1%BB%87t" title="Một danh sách chứa tất cả trang đặc biệt [q]" accesskey="q"><span>Trang đặc biệt</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&oldid=71913788" title="Liên kết thường trực đến phiên bản này của trang"><span>Liên kết thường trực</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&action=info" title="Thêm chi tiết về trang này"><span>Thông tin trang</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=%C4%90%E1%BA%B7c_bi%E1%BB%87t:Tr%C3%ADch_d%E1%BA%ABn&page=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&id=71913788&wpFormIdentifier=titleform" title="Hướng dẫn cách trích dẫn trang này"><span>Trích dẫn trang này</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=%C4%90%E1%BA%B7c_bi%E1%BB%87t:UrlShortener&url=https%3A%2F%2Fvi.wikipedia.org%2Fwiki%2FT%25E1%25BB%2591c_%25C4%2591%25E1%25BB%2599_v%25C5%25A9_tr%25E1%25BB%25A5_c%25E1%25BA%25A5p_2"><span>Lấy URL ngắn gọn</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=%C4%90%E1%BA%B7c_bi%E1%BB%87t:QrCode&url=https%3A%2F%2Fvi.wikipedia.org%2Fwiki%2FT%25E1%25BB%2591c_%25C4%2591%25E1%25BB%2599_v%25C5%25A9_tr%25E1%25BB%25A5_c%25E1%25BA%25A5p_2"><span>Tải mã QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> In và xuất </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=%C4%90%E1%BA%B7c_bi%E1%BB%87t:S%C3%A1ch&bookcmd=book_creator&referer=T%E1%BB%91c+%C4%91%E1%BB%99+v%C5%A9+tr%E1%BB%A5+c%E1%BA%A5p+2"><span>Tạo một quyển sách</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=%C4%90%E1%BA%B7c_bi%E1%BB%87t:DownloadAsPdf&page=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&action=show-download-screen"><span>Tải dưới dạng PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&printable=yes" title="Bản để in ra của trang [p]" accesskey="p"><span>Bản để in ra</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> Tại dự án khác </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q166530" title="Liên kết đến khoản mục kết nối trong kho dữ liệu [g]" accesskey="g"><span>Khoản mục Wikidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Công cụ trang"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Giao diện"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Giao diện</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">chuyển sang thanh bên</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">ẩn</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Bách khoa toàn thư mở Wikipedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="vi" dir="ltr"><p><b>Tốc độ vũ trụ cấp 2</b>, còn gọi là <b>vận tốc vũ trụ cấp 2</b> hay <b>vận tốc thoát ly</b>, là giá trị <a href="/wiki/V%E1%BA%ADn_t%E1%BB%91c" title="Vận tốc">vận tốc</a> tối thiểu một vật thể cần có để có thể thoát ra khỏi <a href="/wiki/T%C6%B0%C6%A1ng_t%C3%A1c_h%E1%BA%A5p_d%E1%BA%ABn" title="Tương tác hấp dẫn">trường hấp dẫn</a> của một <a href="/wiki/H%C3%A0nh_tinh" title="Hành tinh">hành tinh</a>. Với <a href="/wiki/Tr%C3%A1i_%C4%90%E1%BA%A5t" title="Trái Đất">Trái Đất</a> giá trị này vào khoảng 11,2 km/s, theo công thức <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle v_{2}={\sqrt {2}}\cdot v_{1}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>v</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msub> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <mn>2</mn> </msqrt> </mrow> <mo>⋅</mo> <msub> <mi>v</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>1</mn> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle v_{2}={\sqrt {2}}\cdot v_{1}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/e474ee0496b1d2e919183b7a39f405469045d5eb" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:12.24ex; height:3.009ex;" alt="{\displaystyle v_{2}={\sqrt {2}}\cdot v_{1}}"></span>, với <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle v_{1}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>v</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>1</mn> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle v_{1}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/98d33f5d498d528bd8c10edc8ac8c34347f32b3a" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:2.182ex; height:2.009ex;" alt="{\displaystyle v_{1}}"></span> là <a href="/wiki/T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_1" title="Tốc độ vũ trụ cấp 1">vận tốc vũ trụ cấp 1</a>. </p><p>Sau đây là cách dùng <a href="/wiki/C%C6%A1_n%C4%83ng" title="Cơ năng">định luật bảo toàn cơ năng</a> để xác lập biểu thức này: </p> <dl><dt><a href="/w/index.php?title=C%C6%A1_n%C4%83ng_n%C6%A1i_ph%C3%B3ng&action=edit&redlink=1" class="new" title="Cơ năng nơi phóng (trang không tồn tại)">Cơ năng nơi phóng</a> = <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\frac {mv_{2}^{2}}{2}}-{\frac {GMm}{R}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <mi>m</mi> <msubsup> <mi>v</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msubsup> </mrow> <mn>2</mn> </mfrac> </mrow> <mo>−</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <mi>G</mi> <mi>M</mi> <mi>m</mi> </mrow> <mi>R</mi> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\frac {mv_{2}^{2}}{2}}-{\frac {GMm}{R}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/ceae640c6300368fe5f4bffd0a7edcba4dec878b" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.005ex; width:15.044ex; height:6.009ex;" alt="{\displaystyle {\frac {mv_{2}^{2}}{2}}-{\frac {GMm}{R}}}"></span></dt></dl> <dl><dt>Cơ năng khi vật thoát khỏi lực hấp dẫn= động năng + thế năng (Px5)</dt></dl> <p>Vận tốc tối thiểu được xác định trong trường hợp giá trị vận tốc của vật khi thoát khỏi lực hấp dẫn Trái Đất bằng 0 tức là động năng bằng 0. Mà khi đó thế năng hẫp dẫn cũng bằng 0 do vật đã thoát ra khỏi trường hấp dẫn của hành tinh, do đó trong trường hợp này cơ năng khi vật thoát khỏi trường hấp dẫn = 0. Áp dụng định luật bảo toàn cơ năng: </p> <dl><dt>Cơ năng nơi phóng - Cơ năng khi vật thoát khỏi lực hấp dẫn=0</dt> <dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\frac {mv_{2}^{2}}{2}}-{\frac {GMm}{R}}=0}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <mi>m</mi> <msubsup> <mi>v</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msubsup> </mrow> <mn>2</mn> </mfrac> </mrow> <mo>−</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <mi>G</mi> <mi>M</mi> <mi>m</mi> </mrow> <mi>R</mi> </mfrac> </mrow> <mo>=</mo> <mn>0</mn> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\frac {mv_{2}^{2}}{2}}-{\frac {GMm}{R}}=0}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/465c3619636d083131fa1df51bdd812f414e89df" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.005ex; width:19.305ex; height:6.009ex;" alt="{\displaystyle {\frac {mv_{2}^{2}}{2}}-{\frac {GMm}{R}}=0}"></span></dd> <dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle v_{2}={\sqrt {\frac {2GM}{R}}}={\sqrt {2}}.v_{1}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>v</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msub> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <mfrac> <mrow> <mn>2</mn> <mi>G</mi> <mi>M</mi> </mrow> <mi>R</mi> </mfrac> </msqrt> </mrow> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <mn>2</mn> </msqrt> </mrow> <mo>.</mo> <msub> <mi>v</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>1</mn> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle v_{2}={\sqrt {\frac {2GM}{R}}}={\sqrt {2}}.v_{1}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/b47c5ea85d1ecac081b6f9daec433b3676000f3b" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:23.284ex; height:6.176ex;" alt="{\displaystyle v_{2}={\sqrt {\frac {2GM}{R}}}={\sqrt {2}}.v_{1}}"></span></dd></dl> <p>vì <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle v_{1}={\sqrt {\frac {GM}{R}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>v</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>1</mn> </mrow> </msub> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <mfrac> <mrow> <mi>G</mi> <mi>M</mi> </mrow> <mi>R</mi> </mfrac> </msqrt> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle v_{1}={\sqrt {\frac {GM}{R}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/461b75a6d7fc9ea7b3e62d963e2f371c0a372764" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:12.709ex; height:6.176ex;" alt="{\displaystyle v_{1}={\sqrt {\frac {GM}{R}}}}"></span>= 7.9Km/s </p><p>Trong trường hợp vật phóng từ <a href="/wiki/Tr%C3%A1i_%C4%90%E1%BA%A5t" title="Trái Đất">Trái Đất</a> với vận tốc lớn hơn <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle v_{2}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>v</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle v_{2}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/eb04c423c2cb809c30cac725befa14ffbf4c85f3" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:2.182ex; height:2.009ex;" alt="{\displaystyle v_{2}}"></span> nhưng nhỏ hơn <a href="/wiki/T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_3" title="Tốc độ vũ trụ cấp 3">vận tốc vũ trụ cấp 3</a> thì vật đó sẽ chuyển động quanh <a href="/wiki/M%E1%BA%B7t_Tr%E1%BB%9Di" title="Mặt Trời">Mặt Trời</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Xem_thêm"><span id="Xem_th.C3.AAm"></span>Xem thêm</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&veaction=edit&section=1" title="Sửa đổi phần “Xem thêm”" class="mw-editsection-visualeditor"><span>sửa</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&action=edit&section=1" title="Sửa mã nguồn tại đề mục: Xem thêm"><span>sửa mã nguồn</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_1" title="Tốc độ vũ trụ cấp 1">Tốc độ vũ trụ cấp 1</a></li> <li><a href="/wiki/T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_3" title="Tốc độ vũ trụ cấp 3">Tốc độ vũ trụ cấp 3</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Tham_khảo"><span id="Tham_kh.E1.BA.A3o"></span>Tham khảo</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&veaction=edit&section=2" title="Sửa đổi phần “Tham khảo”" class="mw-editsection-visualeditor"><span>sửa</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&action=edit&section=2" title="Sửa mã nguồn tại đề mục: Tham khảo"><span>sửa mã nguồn</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r71728118">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist" style="list-style-type: decimal;"> </div> <div class="mw-heading mw-heading2"><h2 id="Liên_kết_ngoài"><span id="Li.C3.AAn_k.E1.BA.BFt_ngo.C3.A0i"></span>Liên kết ngoài</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&veaction=edit&section=3" title="Sửa đổi phần “Liên kết ngoài”" class="mw-editsection-visualeditor"><span>sửa</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=T%E1%BB%91c_%C4%91%E1%BB%99_v%C5%A9_tr%E1%BB%A5_c%E1%BA%A5p_2&action=edit&section=3" title="Sửa mã nguồn tại đề mục: Liên kết ngoài"><span>sửa mã nguồn</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://www.britannica.com/EBchecked/topic/192265">Escape velocity (physics)</a> tại <i><a href="/wiki/Encyclop%C3%A6dia_Britannica" title="Encyclopædia Britannica">Encyclopædia Britannica</a></i> <b style="font-size: 0.95em; color:var(--color-subtle,#555);">(tiếng Anh)</b></li> <li><a rel="nofollow" class="external text" href="https://bachkhoatoanthu.vass.gov.vn/noidung/tudien/Lists/GiaiNghia/View_Detail.aspx?ItemID=1214">Tốc độ vũ trụ cấp II</a> tại <a href="/wiki/T%E1%BB%AB_%C4%91i%E1%BB%83n_b%C3%A1ch_khoa_Vi%E1%BB%87t_Nam" title="Từ điển bách khoa Việt Nam">Từ điển bách khoa Việt Nam</a> <ul><li><a rel="nofollow" class="external text" href="https://bachkhoatoanthu.vass.gov.vn/noidung/tudien/Lists/GiaiNghia/View_Detail.aspx?ItemID=1213">Tốc độ vũ trụ cấp I</a> tại <a href="/wiki/T%E1%BB%AB_%C4%91i%E1%BB%83n_b%C3%A1ch_khoa_Vi%E1%BB%87t_Nam" title="Từ điển bách khoa Việt Nam">Từ điển bách khoa Việt Nam</a></li> <li><a rel="nofollow" class="external text" href="https://bachkhoatoanthu.vass.gov.vn/noidung/tudien/Lists/GiaiNghia/View_Detail.aspx?ItemID=1215">Tốc độ vũ trụ cấp III</a> tại <a href="/wiki/T%E1%BB%AB_%C4%91i%E1%BB%83n_b%C3%A1ch_khoa_Vi%E1%BB%87t_Nam" title="Từ điển bách khoa Việt Nam">Từ điển bách khoa Việt Nam</a></li></ul></li></ul> <div class="boilerplate metadata plainlinks" id="stub"><table class="metadata plainlinks stub" style="background: transparent;" role="presentation"><tbody><tr> <td><span typeof="mw:File"><a href="/wiki/T%E1%BA%ADp_tin:Science.jpg" class="mw-file-description"><img alt="Hình tượng sơ khai" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/54/Science.jpg/30px-Science.jpg" decoding="async" width="30" height="32" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/54/Science.jpg/45px-Science.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/54/Science.jpg/60px-Science.jpg 2x" data-file-width="70" data-file-height="75" /></a></span></td> <td><i>Bài viết về chủ đề <a href="/wiki/V%E1%BA%ADt_l%C3%BD_h%E1%BB%8Dc" title="Vật lý học">vật lý</a> này vẫn còn <a href="/wiki/Wikipedia:B%C3%A0i_s%C6%A1_khai" title="Wikipedia:Bài sơ khai">sơ khai</a>. 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Space Research Organisation">Indian Space Research Organisation</a></li> <li><a href="/wiki/NASA" title="NASA">NASA</a></li></ul> </div></td></tr></tbody></table></div> <div class="boilerplate metadata plainlinks" id="stub"><table class="metadata plainlinks stub" style="background: transparent;" role="presentation"><tbody><tr> <td><i>Bài viết này vẫn còn <a href="/wiki/Wikipedia:B%C3%A0i_s%C6%A1_khai" title="Wikipedia:Bài sơ khai">sơ khai</a>. 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