成考院校在线答案
- 2023-02-12 [单选] <p class="MsoNormal">10、<span style="font-family:宋体">在下图所示机构中，杆</span><i><span lang="EN-US">O</span></i><sub><span lang="EN-US">1</span></sub><i><span lang="EN-US">A</span></i><u><span style="font-family:宋体">∥</span></u><i><span lang="EN-US">O</span></i><sub><span lang="EN-US">2</span></sub><i><span lang="EN-US">B</span></i><span style="font-family:宋体">，杆</span><i><span lang="EN-US">O</span></i><sub><span lang="EN-US">2</span></sub><i><span lang="EN-US">C</span></i><u><span style="font-family:宋体">∥</span></u><i><span lang="EN-US">O</span></i><sub><span lang="EN-US">3</span></sub><i><span lang="EN-US">D</span></i><span style="font-family:宋体">，且</span><i><span lang="EN-US">O</span></i><sub><span lang="EN-US">1</span></sub><i><span lang="EN-US">A</span></i><span lang="EN-US"> = 200 mm</span><span style="font-family:宋体">，</span><i><span lang="EN-US">O</span></i><sub><span lang="EN-US">2</span></sub><i><span lang="EN-US">C</span></i><span lang="EN-US"> = 400 mm</span><span style="font-family:宋体">，</span><i><span lang="EN-US">CM</span></i><span lang="EN-US"> = <i>MD</i> = 300 mm</span><span style="font-family:宋体">，若杆</span><i><span lang="EN-US">AO</span></i><sub><span lang="EN-US">1</span></sub><span style="font-family:宋体">以角速度</span> <i><span lang="EN-US" style="font-family: Symbol">w</span><span lang="EN-US"> </span></i><span lang="EN-US">=3 rad/s</span><span style="font-family:宋体">匀速转动，则点</span><i><span lang="EN-US">D</span></i><span style="font-family:宋体">的速度的大小为</span><u><span lang="EN-US"> </span></u><span lang="EN-US">cm/s</span><span style="font-family:宋体">，点</span><i><span lang="EN-US">M</span></i><span style="font-family:宋体">的加速度的大小为</span><u><span lang="EN-US"> </span></u><span style="font-family:宋体">。则横线上正确的是</span><span lang="EN-US">( )</span><span style="font-family:宋体">。</span></p> <p class="MsoNormal"><span lang="EN-US"><img width="172" height="91" id="图片 14" src="http://wljy.whut.edu.cn//uploadfiles/word/lllx001.files/image010.jpg"></span></p>
- 2023-02-12 [单选] <p class="MsoNormal">32、 <span style="font-family:Microsoft Yahei;">结构如图</span><span>1</span><span style="font-family:Microsoft Yahei;">所示，力</span><i><span>F</span></i><span style="font-family:Microsoft Yahei;">与杆</span><span>1</span><span style="font-family:Microsoft Yahei;">和杆</span><span>2</span><span style="font-family:Microsoft Yahei;">平行，不计各构件自重，则图示结构中的零力杆为：<img alt="" src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205091916_982.png"></span></p><p class="MsoNormal"> <span style="font-size:12pt;"> </span> </p>
- 2023-02-12 [单选] <p class="MsoNormal">25、 <span style="font-family:Microsoft Yahei;">平面运动刚体上三个点</span><span>A</span><span style="font-family:Microsoft Yahei;">、</span><span>B</span><span style="font-family:Microsoft Yahei;">、</span><span>C</span><span style="font-family:Microsoft Yahei;">构成等边三角形，某瞬时各点加速度或速度矢量如图</span><span>2</span><span style="font-family:Microsoft Yahei;">所示。则图</span><span>2</span><span style="font-family:Microsoft Yahei;">中——所示的运动是可能的。<img alt="" src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205092931_439.png"></span></p><p class="MsoNormal"> <span style="font-size:12pt;"> </span> </p>
- 2023-02-12 [单选] <p class="MsoNormal">13、<span style="font-family:宋体">已知质点沿</span><i><span lang="EN-US">x</span></i><span style="font-family:宋体">轴做直线运动，某瞬时速度为</span><span lang="EN-US" style="font-family:Symbol">u</span><i><sub><span lang="EN-US">x </span></sub></i><span lang="EN-US">= <i>x </i>= 2 m/s</span><span style="font-family:宋体">，瞬时加速度为</span><i><span lang="EN-US">a<sub>x</sub></span></i><span lang="EN-US"> = <span style="position:relative;top:3.0pt"><img width="12" height="17" id="对象 5" src="http://wljy.whut.edu.cn//uploadfiles/word/lllx001.files/image005.png"></span><i> </i>= -2 m/s<sup>2</sup></span><span style="font-family:宋体">，则</span><span lang="EN-US">1 s</span><span style="font-family:宋体">以后点的速度大小</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">6、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">力的多边形闭合的几何条件是（</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">15、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">牛顿第一定律又称为（</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">39、 <span style="font-family:Microsoft Yahei;">如图所示四连杆机构中，</span><i><span>AB=1m</span></i><span style="font-family:Microsoft Yahei;">，</span> <i><span>AD=3m</span></i><span style="font-family:Microsoft Yahei;">，</span> <i><span>BC=CD=2m</span></i><span style="font-family:Microsoft Yahei;">，已知</span><i><span>AB</span></i><span style="font-family:Microsoft Yahei;">以匀角速度</span><span>10rad/s</span><span style="font-family:Microsoft Yahei;">，绕</span><i><span>A</span></i><span style="font-family:Microsoft Yahei;">轴转动。试求</span><i><span>BC</span></i><span style="font-family:Microsoft Yahei;">杆的角加速度。<img alt="" src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191120/20191120102410_785.png"></span> </p><p class="MsoNormal"> <span> </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"">质心在转轴上的匀角速度定轴转动刚体，其惯性力系向转轴上的某点简化的结果可能是：</span></p>
- 2023-02-12 [单选] <p class="MsoNormal">24、 <span style="font-family:Microsoft Yahei;">一水平简支梁结构，约束和载荷如图所示，求支座</span><i><span>A</span></i><span style="font-family:Microsoft Yahei;">的约束反力。<img src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191120/20191120095005_499.png" alt=""></span></p><p class="MsoNormal"> <span> </span></p>
- 2023-02-12 [单选] <p class="MsoNormal">34、<span style="font-family:宋体">如下图所示，将大小为</span><span lang="EN-US">100 N</span><span style="font-family:宋体">的力</span><b><i><span lang="EN-US">F</span></i></b><span style="font-family:宋体">沿</span><i><span lang="EN-US">x</span></i><span style="font-family:宋体">、</span><i><span lang="EN-US">y</span></i><span style="font-family:宋体">方向分解，若</span><i><span lang="EN-US">F</span></i><span style="font-family:宋体">在</span><i><span lang="EN-US">x</span></i><span style="font-family:宋体">轴上的投影为</span><span lang="EN-US">86.6 N</span><span style="font-family:宋体">，而沿</span><i><span lang="EN-US">x</span></i><span style="font-family:宋体">方向的分力的大小为</span><span lang="EN-US">115.47 N</span><span style="font-family:宋体">，则</span><b><i><span lang="EN-US">F</span></i></b><span style="font-family:宋体">在</span><i><span lang="EN-US">y</span></i><span style="font-family:宋体">轴上的投影为</span><span lang="EN-US">( )</span><span style="font-family:宋体">。</span></p> <p class="MsoNormal"><span lang="EN-US"><img width="150" height="72" id="图片 2" src="http://wljy.whut.edu.cn//uploadfiles/word/lllx001.files/image002.jpg"></span></p>