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href='http://m.runthegoodtimes.com/wenda/' title='問(wèn)答'>問(wèn)答</a><code>></code> 地球?qū)υ铝恋囊κ菑椓?/span></div> <div id="zvd92vv6bc" class="main-left"> <div id="zvd92vv6bc" class="article"> <script type="text/javascript">s("title_top");</script> <h1 class="title">地球?qū)υ铝恋囊κ菑椓?/h1> <script type="text/javascript">s("content_top");</script> <div id="zvd92vv6bc" class="answer"><span>回答</span><em></em></div> <div id="zvd92vv6bc" class="answer_t"> <i class="answer_icon"></i> <span>瑞文問(wèn)答</span> <p>2024-09-24</span> </div> <div id="zvd92vv6bc" class="explain"> 地球?qū)υ铝恋囊Σ皇菑椓�，地球�(qū)υ铝恋奈侨f(wàn)有引力。萬(wàn)有引力是指任何物體之間都有相互吸引力，這個(gè)力的大小與各個(gè)物體的質(zhì)量成正比例，而與它們之間的距離的平方成反比。 </div> <div id="zvd92vv6bc" class="content-title"><i></i><h2>擴(kuò)展資料</h2></div> <div id="zvd92vv6bc" class="content"><p>　　彈力</p><p style="text-align: center;"><img loading="lazy" src="https://p.9136.com/00/l/d4c2c1c109_5fbf7ede7bd51.jpg" alt="地球?qū)υ铝恋囊κ菑椓?/></p><p>　　彈力亦稱“彈性力”。物體受外力作用發(fā)生形變后，若撤去外力，物體能恢復(fù)到原來(lái)形狀的力，叫作“彈力”。它的方向跟使物體產(chǎn)生形變的外力的方向相反。因物體的形變有多種多樣，所以產(chǎn)生的彈力也有各種不同的形式。例如，一重物放在塑料板上，被壓彎的塑料要恢復(fù)原狀，產(chǎn)生向上的彈力，這就是它對(duì)重物的支持力。</p><p>　　將一物體掛在彈簧上，物體把彈簧拉長(zhǎng)，被拉長(zhǎng)的彈簧要恢復(fù)原狀，產(chǎn)生向上的彈力，這就是它對(duì)物體的拉力。不僅塑料、彈簧等能夠發(fā)生形變，任何物體都能夠發(fā)生形變，不發(fā)生形變的物體是不存在的。不過(guò)有的形變比較明顯，能直接見(jiàn)到；有的形變相當(dāng)微小，必須用儀器才能覺(jué)察出來(lái)。</p></div> <script type="text/javascript">s("download_bottom");</script> </div> <script type="text/javascript">s("list_wenzhangtuijian");</script> <div id="zvd92vv6bc" class="previous"> <span id="zvd92vv6bc" class="pre"><a title="世界最長(zhǎng)的跨海大橋是哪一座" href="http://m.runthegoodtimes.com/wenda/167941.html">世界最長(zhǎng)的跨海大橋是哪一座</a> </span> <span id="zvd92vv6bc" class="next"><a title="underground是什么意思" href="http://m.runthegoodtimes.com/wenda/167942.html">underground是什么意思</a> </span> </div> </div> <div id="zvd92vv6bc" class="main-right"> <div id="zvd92vv6bc" class="right_fix"> 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