成考院校在线答案
- 2023-02-12 [单选] <p class="MsoNormal">13、<span style="font-family:宋体">某空间力系，若各力作用线均通过某一固定点，则其独立的平衡方程式的最大数目为</span><span lang="EN-US">( )</span><span style="font-family:宋体">个。</span></p> <p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"> </span></p>
- 2023-02-12 [单选] <p class="MsoNormal">17、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">正立方体的顶角上作用着六个大小相等的力，此力系向任一点简化的结果是（</span><span lang="EN-US"><span style="mso-spacerun:yes"> </span></span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">）。</span></p> <p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"> <v:shape id="_x0000_i1048" type="#_x0000_t75" style="width:125.4pt;height:129pt" o:allowoverlap="f"> <v:imagedata src="LLLXDX.files/image019.png" o:title="二" croptop="1670f" cropbottom="9899f" cropleft="7359f"></v:imagedata> </v:shape></span></p>
- 2023-02-12 [单选] <p class="MsoNormal">20、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">关于平面力偶的性质错误的是（</span><span lang="EN-US"><span style="mso-spacerun:yes"> </span></span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">）</span></p>
- 2023-02-12 [单选] <p class="MsoNormal">22、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">平面一般力系合成的最后结果不可能是下列（</span><span lang="EN-US"><span style="mso-spacerun:yes"> </span></span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">）。</span></p>
- 2023-02-12 [单选] <p class="MsoNormal">26、 <span style="font-family:Microsoft Yahei;">边长</span><i><span>b </span></i><span>=100 <i>mm</i> </span><span style="font-family:Microsoft Yahei;">的正方形均质板重</span><span>400N</span><span style="font-family:Microsoft Yahei;">，由三根绳拉住，如图所示，当</span><b><i><span>FG</span></i></b><span style="font-family:Microsoft Yahei;">绳被剪断的瞬时，</span><b><i><span>BE</span></i></b><span style="font-family:Microsoft Yahei;">绳的张力（</span><span><span> </span></span><span style="font-family:Microsoft Yahei;">）；<img alt="" src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191203/20191203172801_750.png"></span> </p><p class="MsoNormal"> <span> </span> </p>
- 2023-02-12 [单选] <p class="MsoNormal">27、<span style="font-family:宋体">刚体做定轴转动时，刚体上点的法向加速度为</span><span lang="EN-US">( )</span><span style="font-family:宋体">。</span></p> <p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"> </span></p>
- 2023-02-12 [单选] <p class="MsoNormal">28、 <span style="font-family:Microsoft Yahei;">直角刚杆</span><i><span>AO</span></i><span> =2m</span><span style="font-family:Microsoft Yahei;">，</span><i><span>BO </span></i><span>=3m</span><span style="font-family:Microsoft Yahei;">，已知某瞬时</span><i><span>A</span></i><span style="font-family:Microsoft Yahei;">点的速度</span> <img alt="" src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205091417_87.png"><span>=6m/s</span><span style="font-family:Microsoft Yahei;">；而</span><i><span>B</span></i><span style="font-family:Microsoft Yahei;">点的加速度与</span><i><span>BO</span></i><span style="font-family:Microsoft Yahei;">成</span><span> <img alt="" src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205090347_534.png">= 60</span><span style="font-family:Microsoft Yahei;">°角。则该瞬时刚杆的角加速度</span><span> <img alt="" src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205091041_581.png">=</span><u><span style="font-family:Microsoft Yahei;">（</span><span><span> </span></span></u><u><span style="font-family:Microsoft Yahei;">）</span></u><span>rad/s<sup>2</sup></span><span style="font-family:Microsoft Yahei;">。<img alt="" src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205090401_513.png"></span></p><p class="MsoNormal"> <span style="font-size:12pt;"> </span> </p>
- 2023-02-12 [单选] <p class="MsoNormal">31、<span style="font-family:宋体">在点的合成运动问题中，当牵连运动为定轴转动时</span><span lang="EN-US">( )</span><span style="font-family:宋体">。</span></p> <p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"> </span></p>
- 2023-02-12 [单选] <p class="MsoNormal">33、<span style="font-family:宋体">某空间力系，若各力作用线分别通过两固定点，则其独立的平衡方程式的最大数目为</span><span lang="EN-US">( )</span><span style="font-family:宋体">个。</span></p> <p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"> </span></p>
- 2023-02-12 [单选] <p class="MsoNormal">37、<span style="font-family:宋体">如下图所示，已知物体的质量为</span><i><span lang="EN-US">m</span></i><span style="font-family:宋体">，弹簧的刚度系数为</span><i><span lang="EN-US">k</span></i><span style="font-family:宋体">，原长为</span><i><span lang="EN-US">L</span></i><sub><span lang="EN-US">0</span></sub><span style="font-family:宋体">，静伸长为</span><i><span lang="EN-US" style="font-family: Symbol">d</span></i><sub><span lang="EN-US">et</span></sub><span style="font-family:宋体">，如以弹簧原长末端为坐标原点、</span><i><span lang="EN-US">x</span></i><span style="font-family:宋体">轴竖直向下，则重物的运动微分方程为</span><span lang="EN-US">( )</span><span style="font-family:宋体">。</span></p> <p class="MsoNormal"><span lang="EN-US"><img width="107" height="179" id="图片 6" src="http://wljy.whut.edu.cn//uploadfiles/word/lllx001.files/image006.jpg"></span></p>