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1.<span style="font-family: 宋体, SimSun;">关于伽利略对自由落体运动的研究，以下说法正确的是(　　)</span></div><br/><br/>
A.<span style="font-family: 宋体, SimSun;">伽利略认为，在同一地点，重的物体下落得快，轻的物体下落得慢</span></div><br/>
B.<span style="font-family: 宋体, SimSun;">伽利略猜想运动速度与下落时间成正比，并用实验测出不同时刻的速度，验证了他的猜想</span></div><br/>
C.<span style="font-family: 宋体, SimSun;">伽利略通过猜想，数学推演，做铜球沿斜面运动的实验，并将实验结果合理外推，最终得到自由落体运动的速度与时间是成正比的</span></div><br/>
D.<span style="font-family: 宋体, SimSun;">伽利略设想，斜面倾角越接近<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273532023" data-fileid="1394307823513343984" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759720323858854" data-bin="http://file.ewt360.com/file/1398759720323866804" data-id="701983" />，小球沿斜面滚下的运动越接近自由落体运动，这时小球仍然会保持匀加速运动的性质</span></div><br/>
++++++++++++++++++++++++++<br/>
<b>正确答案</b>: ['C', 'D']<br/>
解析:<div class="mst-editor-mce-root-block"><span style="font-family: 宋体, SimSun;"><span style="font-family: 'Times New Roman';">A</span>．亚里士多德认为在同一地点重的物体和轻的物体下落快慢不同，伽利略认为在同一地点，重的物体和轻的物体下落快慢相同，故<span style="font-family: 'Times New Roman';">A</span>错误；</span><br /><span style="font-family: 宋体, SimSun;"><span style="font-family: 'Times New Roman';"><span class="mst-text-indent" contenteditable="false">&nbsp;</span>B</span>．伽利略猜想自由落体的运动速度与下落时间成正比，并未直接进行验证，而是在斜面实验的基础上的理想化推理，故<span style="font-family: 'Times New Roman';">B</span>错误；</span><br /><span style="font-family: 宋体, SimSun;"><span style="font-family: 'Times New Roman';"><span class="mst-text-indent" contenteditable="false">&nbsp;</span>C</span>．伽利略通过数学推演并用小球在斜面上验证了位移与时间的平方成正比，并得出了速度与时间成正比的结论，故<span style="font-family: 'Times New Roman';">C</span>正确；</span><br /><span style="font-family: 宋体, SimSun;"><span style="font-family: 'Times New Roman';"><span class="mst-text-indent" contenteditable="false">&nbsp;</span>D</span>．伽利略斜面实验的卓越之处不是实验本身，而是实验所使用的独特的方法在实验的基础上，进行理想化推理．伽利略思想方法的核心是把实验和逻辑推理（包括数学推演）和谐地结合起来，故<span style="font-family: 'Times New Roman';">D</span>正确．</span></div><br/>
省流:[['C', 'D']]<br/>
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2.<span style="font-family: 宋体, SimSun;">下列关于自由落体运动的说法，正确的是（　　）</span></div><br/><br/>
A.<span style="font-family: 宋体, SimSun;">在真空条件下，处于同一高度的石头和纸片同时落地</span></div><br/>
B.<span style="font-family: 宋体, SimSun;">自由落体运动是初速度为0、加速度为<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273548416" data-fileid="1394307823513343988" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759728913793055" data-bin="http://file.ewt360.com/file/1398759728913801501" data-id="5340" />的匀加速直线运动</span></div><br/>
C.<span style="font-family: 'Times New Roman';"><img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273532025" data-fileid="1394307823513343989" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759728913809523" data-bin="http://file.ewt360.com/file/1398759728913793056" data-id="5340" />值在地球上任何地方都一样大</span></div><br/>
D.<span style="font-family: 宋体, SimSun;">满足速度跟时间成正比的下落运动一定是自由落体运动</span></div><br/>
++++++++++++++++++++++++++<br/>
<b>正确答案</b>: ['A', 'B']<br/>
解析:<div class="mst-editor-mce-root-block"><span style="font-family: 宋体, SimSun;"><span style="font-family: 'Times New Roman';">A</span>．在真空条件下，石头和纸片在同一高度同时释放会同时落地，<span style="font-family: 'Times New Roman';">A</span>正确；</span><br /><span style="font-family: 宋体, SimSun;"><span style="font-family: 'Times New Roman';"><span class="mst-text-indent" contenteditable="false">&nbsp;</span>B</span>．自由落体运动是初速度为<span style="font-family: 'Times New Roman';">0</span>、加速度大小为<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273532021" data-fileid="1394307823513343985" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759720323875539" data-bin="http://file.ewt360.com/file/1398759720323858855" data-id="5340" />、方向竖直向下的匀加速直线运动，<span style="font-family: 'Times New Roman';">B</span>正确；</span><br /><span style="font-family: 宋体, SimSun;"><span style="font-family: 'Times New Roman';"><span class="mst-text-indent" contenteditable="false">&nbsp;</span>C</span>．地球纬度和物体所在高度都会影响重力加速度的大小，故<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273556099" data-fileid="1394307823513343986" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759720323883107" data-bin="http://file.ewt360.com/file/1398759720323875540" data-id="5340" />值在地球上不同地方可能不一样大，<span style="font-family: 'Times New Roman';">C</span>错误；</span><br /><span style="font-family: 宋体, SimSun;"><span style="font-family: 'Times New Roman';"><span class="mst-text-indent" contenteditable="false">&nbsp;</span>D</span>．满足速度跟时间成正比的下落运动不一定是自由落体运动，还要满足初速度为0，加速度为<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273539717" data-fileid="1394307823513343987" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759720323866806" data-bin="http://file.ewt360.com/file/1398759720323883108" data-id="5340" />，<span style="font-family: 'Times New Roman';">D</span>错误．</span></div><br/>
省流:[['A', 'B']]<br/>
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3.<span style="font-family: 宋体, SimSun;">钢球由静止开始做自由落体运动，不计空气阻力，落地时的速度为<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273548415" data-fileid="1394307823513343990" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759728913818376" data-bin="http://file.ewt360.com/file/1398759728913809524" data-id="169342">，<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273539721" data-fileid="1394307823513343991" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759728913801503" data-bin="http://file.ewt360.com/file/1398759728913818377" data-id="5340">取<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273539722" data-fileid="1394307823513343992" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759728913793058" data-bin="http://file.ewt360.com/file/1398759728913801504" data-id="88793">。</span><br><span style="font-family: 宋体, SimSun;">（<span style="font-family: 'Times New Roman';">1</span>）它下落的高度是多少？</span><br><span style="font-family: 宋体, SimSun;">（<span style="font-family: 'Times New Roman';">2</span>）它在前<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273556098" data-fileid="1394307823513343993" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759737503744540" data-bin="http://file.ewt360.com/file/1398759737503728098" data-id="3483">内的平均速度是多少？</span><br><span style="font-family: 宋体, SimSun;">（<span style="font-family: 'Times New Roman';">3</span>）它在最后<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273548417" data-fileid="1394307823513343994" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759737503752655" data-bin="http://file.ewt360.com/file/1398759737503744541" data-id="3356">内下落的高度是多少？</span></div><br/><br/>
++++++++++++++++++++++++++<br/>
<b>正确答案</b>: ['<div class="mst-editor-mce-root-block"><span style="font-family: 宋体, SimSun;">（<span style="font-family: \'Times New Roman\';">1</span>）<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273532022" data-fileid="1394307823513344004" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759754683597415" data-bin="http://file.ewt360.com/file/1398759754683605460" data-id="602685" />；（<span style="font-family: \'Times New Roman\';">2</span>）<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273556097" data-fileid="1394307823513344005" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759754683613660" data-bin="http://file.ewt360.com/file/1398759754683597416" data-id="669407" />；（<span style="font-family: \'Times New Roman\';">3</span>）<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273539718" data-fileid="1394307823513344006" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759754683621411" data-bin="http://file.ewt360.com/file/1398759754683613661" data-id="100598" /></span></div>']<br/>
解析:<div class="mst-editor-mce-root-block"><span style="font-family: 宋体, SimSun;">（<span style="font-family: 'Times New Roman';">1</span>）钢球下落的高度<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273539720" data-fileid="1394307823513343995" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759737503736579" data-bin="http://file.ewt360.com/file/1398759737503752656" data-id="95493" />，代入数据得<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273556102" data-fileid="1394307823513343996" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759737503728100" data-bin="http://file.ewt360.com/file/1398759737503736580" data-id="97108" />．</span><br /><span style="font-family: 宋体, SimSun;"><span class="mst-text-indent" contenteditable="false">&nbsp;</span>（<span style="font-family: 'Times New Roman';">2</span>）钢球在第<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273556100" data-fileid="1394307823513343997" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759737503744543" data-bin="http://file.ewt360.com/file/1398759737503728101" data-id="7699" />末下落的高度<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273539719" data-fileid="1394307823513343998" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759746093687021" data-bin="http://file.ewt360.com/file/1398759746093679101" data-id="721406" />．<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273556101" data-fileid="1394307823513343999" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759746093670639" data-bin="http://file.ewt360.com/file/1398759746093687022" data-id="721407" /></span><br /><span style="font-family: 宋体, SimSun;"><span class="mst-text-indent" contenteditable="false">&nbsp;</span>（<span style="font-family: 'Times New Roman';">3</span>）钢球落地时间<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273532026" data-fileid="1394307823513344000" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759746093662764" data-bin="http://file.ewt360.com/file/1398759746093670640" data-id="721410" />，在最后<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273548419" data-fileid="1394307823513344001" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759746093679103" data-bin="http://file.ewt360.com/file/1398759746093662765" data-id="15643" />内下落的高度<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273532024" data-fileid="1394307823513344002" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759746093687024" data-bin="http://file.ewt360.com/file/1398759746093679104" data-id="721409" />，代入数据得<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273548418" data-fileid="1394307823513344003" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759746093670642" data-bin="http://file.ewt360.com/file/1398759746093687025" data-id="721408" />．</span></div><br/>
省流:[['<div class="mst-editor-mce-root-block"><span style="font-family: 宋体, SimSun;">（<span style="font-family: \'Times New Roman\';">1</span>）<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273532022" data-fileid="1394307823513344004" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759754683597415" data-bin="http://file.ewt360.com/file/1398759754683605460" data-id="602685" />；（<span style="font-family: \'Times New Roman\';">2</span>）<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273556097" data-fileid="1394307823513344005" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759754683613660" data-bin="http://file.ewt360.com/file/1398759754683597416" data-id="669407" />；（<span style="font-family: \'Times New Roman\';">3</span>）<img class="Wirisformula" role="math" src="http://file.ewt360.com/file/1398759763273539718" data-fileid="1394307823513344006" data-type="mathType" data-wmf="http://file.ewt360.com/file/1398759754683621411" data-bin="http://file.ewt360.com/file/1398759754683613661" data-id="100598" /></span></div>']]<br/>
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