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淮南市
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安徽省2017年11月10日/UploadFiles/nopic.gif
【内容简介】
一.填空:(每空2分.共26分)(本试卷中g均取l0N/kg)
1.滑板车是深受小朋友们喜爱的玩具,使用时一只脚站在滑板上,另一只脚蹬地,滑板车就能载者人前进。蹬地时人对车____(填“做功”或“不做功”)
2、2016吉尼斯中国之夜中,有一条叫“阿称纳”的小狗双腿站立用时7.5s登上20级台阶。若每级台阶高20cm,小狗的体重为7.5kg.则它登上20级台阶做的总功为________.整个过程中的平均功率是,_________
3、我们在使用杠杆时,有的杠杆省力但费距离,有的杠杆费力得省距离,但不管是省力杠杆还是费力杠杆都____(填“能”或“不能”)省功。4、工人用如图所示的甲、乙两种滑轮把同样一桶沙提升相同的高度,工人做的有用功分别是W甲、W乙,两滑轮的机械效率分别是η甲、η乙.则W甲______W乙. η甲_____η乙(填“>”、“<”或“=")。5.为了测杠杆的机械效率,小毅同学用如图所示的杠杆将重物(重为G)匀速缓慢提升。已知杠杆OB长为L,重物的悬挂点A是杠杆OB的中点。弹赞测力计的拉力为F,酉物上月的高度为h.则该杠杆的机械效率表达式为: η=_______
6、2017年8月四川省九寨沟县发生7.0级地震。地震后山体滑坡对过往的车辆透成了严重的威胁,即使是从高处落下的小石块,也能对人造成很大的伤害,这是因为高处的小石块具有较大的_____(填“重力势能”或“动能”)。7. “弓开如满月,箭去似流星”形容射箭运动员拉弓放箭的情形。在这个过程中,弓的____能转化为箭的动能。......
下载地址1|sj/2017/11/201711101544571995.doc<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 0pt; mso-pagination: widow-orphan">
<span style="line-height: 150%; font-family: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">一<span lang="EN-US">.</span>填空<span lang="EN-US">:(</span>每空<span lang="EN-US">2</span>分<span lang="EN-US">.</span>共<span lang="EN-US">26</span>分<span lang="EN-US">)(</span>本试卷中<span lang="EN-US">g</span>均取<span lang="EN-US">l0N/kg)<br />
1.</span>滑板车是深受小朋友们喜爱的玩具,使用时一只脚站在滑板上,另一只脚蹬地,滑板车就能载者人前进。蹬地时人对车<span lang="EN-US">____</span>(填<span lang="EN-US">“</span>做功<span lang="EN-US">”</span>或<span lang="EN-US">“</span>不做功<span lang="EN-US">”)<br />
2</span>、<span lang="EN-US">2016</span>吉尼斯中国之夜中,有一条叫<span lang="EN-US">“</span>阿称纳<span lang="EN-US">”</span>的小狗双腿站立用时<span lang="EN-US">7.5s</span>登上<span lang="EN-US">20</span>级台阶。若每级台阶高<span lang="EN-US">20cm</span>,小狗的体重为<span lang="EN-US">7.5kg.</span>则它登上<span lang="EN-US">20</span>级台阶做的总功为<span lang="EN-US">________.</span>整个过程中的平均功率是,<span lang="EN-US">_________<br />
3</span>、我们在使用杠杆时,有的杠杆省力但费距离,有的杠杆费力得省距离,但不管是省力杠杆还是费力杠杆都<span lang="EN-US">____</span>(填<span lang="EN-US">“</span>能<span lang="EN-US">”</span>或<span lang="EN-US">“</span>不能<span lang="EN-US">”)</span>省功。<br /><span lang="EN-US">4</span>、工人用如图所示的甲、乙两种滑轮把同样一桶沙提升相同的高度,工人做的有用功分别是<span lang="EN-US">W</span><sub>甲</sub>、<span lang="EN-US">W</span><sub>乙</sub><span lang="EN-US">,</span>两滑轮的机械效率分别是η<sub>甲</sub>、η<sub>乙</sub><span lang="EN-US">.</span>则<span lang="EN-US">W</span><sub>甲</sub><span lang="EN-US">______W</span><sub>乙</sub><span lang="EN-US">. </span>η<sub>甲</sub><span lang="EN-US">_____</span>η<sub>乙</sub><span lang="EN-US">(</span>填<span lang="EN-US">“>”</span>、<span lang="EN-US">“<”</span>或<span lang="EN-US">“=")</span>。<br /><span lang="EN-US">5.</span>为了测杠杆的机械效率<span lang="EN-US">,</span>小毅同学用如图所示的杠杆将重物<span lang="EN-US">(</span>重为<span lang="EN-US">G)</span>匀速缓慢提升。已知杠杆<span lang="EN-US">OB</span>长为<span lang="EN-US">L,</span>重物的悬挂点<span lang="EN-US">A</span>是杠杆<span lang="EN-US">OB</span>的中点。弹赞测力计的拉力为<span lang="EN-US">F,</span>酉物上月的高度为<span lang="EN-US">h.</span>则该杠杆的机械效率表达式为<span lang="EN-US">: </span>η<span lang="EN-US">=_______ </span></span></p>
<p>
<span lang="EN-US" style="line-height: 115%; font-family: 宋体; font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">6</span><span style="line-height: 115%; font-family: 宋体; font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">、<span lang="EN-US">2017</span>年<span lang="EN-US">8</span>月四川省九寨沟县发生<span lang="EN-US">7.0</span>级地震。地震后山体滑坡对过往的车辆透成了严重的威胁,即使是从高处落下的小石块,也能对人造成很大的伤害,这是因为高处的小石块具有较大的<span lang="EN-US">_____(</span>填<span lang="EN-US">“</span>重力势能<span lang="EN-US">”</span>或<span lang="EN-US">“</span>动能<span lang="EN-US">”)</span>。<br /><span lang="EN-US">7. “</span>弓开如满月,箭去似流星<span lang="EN-US">”</span>形容射箭运动员拉弓放箭的情形。在这个过程中,弓的<span lang="EN-US">____</span>能转化为箭的动能。<br style="mso-special-character: line-break" /><br style="mso-special-character: line-break" /><span lang="EN-US">......</span></span></p>沪粤版不限试题试卷免费doc
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