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class="q-tit"> （1）請(qǐng)指出該同學(xué)在實(shí)驗(yàn)操作中存在的兩處明顯錯(cuò)誤或不當(dāng)：①<span id="mqln7tl" class="filling" ></span>；②<span id="kxqxabd" class="filling" ></span>．</p> </div> </div> </div> <li> <li> <div id="x8vwz4z" class="question-block"> <div id="bizzjh4" class="q-mc"> <div id="95vv9h6" class="q-tit"> （2）該同學(xué)經(jīng)正確操作得到如圖乙所示的紙帶，取連續(xù)打的六個(gè)點(diǎn)A、B、C、D、E、F 為計(jì)數(shù)點(diǎn)，測(cè)得點(diǎn)A到B、C、D、E、F的距離分別為h<sub>1</sub>、h<sub>2</sub>、h<sub>3</sub>、h<sub>4</sub>、h<sub>5</sub> ．若打點(diǎn)的頻率為f（h、f 均采用國(guó)際單位），則打E點(diǎn)時(shí)重物速度的表達(dá)式為v<sub>E</sub>=<span id="ypip063" class="filling" ></span>；若分別計(jì)算出各計(jì)數(shù)點(diǎn)對(duì)應(yīng)的速度數(shù)值，并在坐標(biāo)系中畫出速度的二次方（v<sup>2</sup>）與距離（h）的關(guān)系圖線如圖丙所示，則重力加速度g=<span id="3rdevem" class="filling" ></span>m/s<sup>2</sup> ．（保留兩位有效數(shù)字）</p> </div> </div> </div> <li> </ol> </div> </div> </li> </ul> <div style="height:20px;background-color: #fff;margin-top:1px"></div>  <div class="idnmcde" id="J_ConnectQuestionsdBox"> </div> 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