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class="pointer">高中物理</a> <span>/</span> <a href="javascript:;">解答題</a> </div> <div id="rgxuw4s" class="m-wrap g-cw cfx"> <div id="9a9ct44" class="w fl"> <div id="4anplkz" class="g-mn2"> <ul id="J_question_detail" > <li> <div id="h4wzv45" class="question-block"> <div id="uzd9mcc" class="q-mc"> <h1 class="q-tit"> 1. <a href="/paper/view-5382636.shtml" class="ques-origin a-pointer" target="_blank"> (2024高一上·衡陽開學(xué)考) </a> 如圖甲所示為《天工開物》中記載的我國傳統(tǒng)提水工具桔槔。圖乙為其原理示意圖，O為支點，A端用細(xì)繩懸掛一重石，B端用細(xì)繩懸掛水桶。已知水桶重力為<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmn%3E20%3C%2Fmn%3E%3Cmtext%3EN%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">、容積為<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmn%3E2.8%3C%2Fmn%3E%3Cmo%3E%C3%97%3C%2Fmo%3E%3Cmsup%3E%3Cmrow%3E%3Cmn%3E10%3C%2Fmn%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmo%3E%E2%88%92%3C%2Fmo%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmsup%3E%3Cmsup%3E%3Cmtext%3Em%3C%2Fmtext%3E%3Cmn%3E3%3C%2Fmn%3E%3C%2Fmsup%3E%3Cmo%3E%2C%3C%2Fmo%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"><img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmi%3EO%3C%2Fmi%3E%3Cmi%3EA%3C%2Fmi%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmi%3EO%3C%2Fmi%3E%3Cmi%3EB%3C%2Fmi%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmn%3E3%3C%2Fmn%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> ，懸掛桶的繩子始終保持在豎直狀態(tài)，忽略桿和繩的重力。（<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmsub%3E%3Cmi%3E%CF%81%3C%2Fmi%3E%3Cmi+mathvariant%3D%22normal%22%3E%E6%B0%B4%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmn%3E1.0%3C%2Fmn%3E%3Cmo%3E%C3%97%3C%2Fmo%3E%3Cmsup%3E%3Cmrow%3E%3Cmn%3E10%3C%2Fmn%3E%3C%2Fmrow%3E%3Cmn%3E3%3C%2Fmn%3E%3C%2Fmsup%3E%3Cmtext%3Ekg%3C%2Fmtext%3E%3Cmo%3E%2F%3C%2Fmo%3E%3Cmsup%3E%3Cmtext%3Em%3C%2Fmtext%3E%3Cmn%3E3%3C%2Fmn%3E%3C%2Fmsup%3E%3Cmo%3E%2C%3C%2Fmo%3E%3Cmi%3Eg%3C%2Fmi%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">取<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmn%3E10%3C%2Fmn%3E%3Cmtext%3EN%3C%2Fmtext%3E%3Cmo%3E%2F%3C%2Fmo%3E%3Cmtext%3Ekg%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">）<p style="text-align:justify;"><img src="http://tikupic.21cnjy.com/ct20241o/06/08/0608a7f610f6038d938b292fafca13b1.png" width="356" height="184" style="max-width:100%;"></p> </h1> <ol class="q-bd-list"> <li> <div id="ip4qqkd" class="question-block"> <div id="fwe4g4b" class="q-mc"> <div id="9eilepl" class="q-tit"> （1）桶裝滿水時，求水桶中水的質(zhì)量； </div> </div> </div> <li> <li> <div id="kdvhr9v" class="question-block"> <div id="r4tuycu" class="q-mc"> <div id="jgucq4m" class="q-tit"> （2）空桶在水中漂浮時，求桶排開水的體積； </div> </div> </div> <li> <li> <div id="4sckhh4" class="question-block"> <div id="4rcennn" class="q-mc"> <div id="ibuvfv9" class="q-tit"> （3）一重力為<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmn%3E480%3C%2Fmn%3E%3Cmtext%3EN%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">的人用桔槔將裝滿水的桶提出水面（忽略桶外壁沾水），當(dāng)桔槔處于水平平衡狀態(tài)時，人對地面的壓力為<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmn%3E600%3C%2Fmn%3E%3Cmtext%3EN%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> ，求重石的重力。 </div> </div> </div> <li> </ol> </div> </div> </li> </ul> <div style="height:20px;background-color: #fff;margin-top:1px"></div>  <div class="cnatdtm" id="J_ConnectQuestionsdBox"> </div> </div> </div> <div id="4fjed9e" class="g-sd2">  <div style="background:#fff;padding:20px 0;margin-bottom:20px;text-align:center;"> <img src="/question/paper-qrcode?id=58803551" width="140px" height="140px" alt=""> <p style="text-align:center;margin-top: 10px">微信掃碼預(yù)覽、分享更方便</p> </div> <div id="9gjuf9v" class="analyize-extend JV_question__papers"> </div>  <div id="c9wgrol" class="JV_question__subject"> <ul class="subjects-recomm"> <li> <a href="/merge?id=394" target="_blank"> <img 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