光滑的水平面上,放置一静止的均质直杆 AB 。当 AB 上受一力偶 M 作用时, AB 将绕 ________ 点转动。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/fafcfe79d5434126b430078288fe6b95.png
举一反三
- 光滑的水平面上,放置一静止的均质直杆AB。当AB上受一力偶M作用时,AB将绕__...b430078288fe6b95.png
- 在正立方体的前侧面沿AB方向作用一力,则该力______。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/ba42e7c635dd4e388e6770748a751735.png
- 有一半径为R的水平圆转台,可绕通过其中心的竖直固定光滑轴转动,转动惯量为J,开始时转台以匀角速度<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/ed67d7f8595f462fbc1cdec84d274f10.png" />转动,此时有一质量为m的人站在转台中心。随后人沿半径向外跑去,当人到达转台边缘时,转台的角速度为( ) A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/f49b5cb39a54454d8fc78ba116473b25.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/83dfbb789f98426db5035f2c8f6db5e9.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/564d67c3c5b845259a99c3b436e962f3.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/3d173073724f4699ad244feb5d27e668.png" />
- 均质杆AB质量为m,两端用张紧的绳子系住,绕O轴转动,如图所示,则杆AB对O轴的动量矩_______。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201805/e6b5bd619c574ee293e13ff8824f0a1e.png
- 均质细杆 AB 重 P ,用二铅直细绳悬挂成水平位置,当 B 端细绳突然剪断瞬时, A 点的加速度的大小为 __ ______ 。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/0e5d1187abbe4a8da161962eada13334.png