均质圆盘C质量为m，半径为r，在半径为R的圆弧形轨道上纯滚动，轮心C点速度v为常数；则在图示瞬时圆盘对C轴的动量矩大小为（ ）
A: 选项A
B: 选项D
C: 选项B
D: 选项C
A: 选项A
B: 选项D
C: 选项B
D: 选项C
举一反三
- 图示半径为R,质量为m1的均质滑轮上,作用一常力偶M,提升一质量为m2的重物,则重物上升高度h的过程中,力偶M的功为_______<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201805/724ffab09d304be78a3a0c11f3720101.png" /><img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201805/85bce1f2cfca4096ba659a0777799966.png" /> A: 选项D B: 选项B C: 选项A D: 选项C
- 均质圆盘C质量为m,半径为r,在半径为R的圆弧形轨道上纯滚动,轮心C点速度v为常数;则在图示瞬时圆盘对C轴的动量矩大小为() A: 选项A B: 选项B C: 选项C D: 选项D
- 在均匀电场中，作一半径为R的半球面，使半球面的轴与场强E的方向平行，则通过这一半球面的电通量为 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201805/bf341a312be54f3c99c3472135e65b4d.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201805/75062c5d50c24d6684010689732915ac.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201805/47e2f56b1f234526a7582ca537740bcc.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201805/5284cd2d979041baaed0b04028cfb72b.png" />
- 均质圆盘C质量为m，半径为r，在半径为R的圆弧形轨道上纯滚动，轮心C点速度v为常数；则在图示瞬时圆盘对C轴的动量矩大小为（ ）[img=234x277]17d6052a32e20bc.png[/img][img=206x106]17d6052a3d2ece1.png[/img] A: 选项A B: 选项D C: 选项B D: 选项C
- 质点作半径为R的变速圆周运动时的加速度大小为（v表示任一时刻质点的速率）( ) A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/566625ddf2c44d81babb2fdd6c1215b2.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/bceb93f381844a3988a0291fea01e102.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/e43ab8d2b7b4422a9088f99e594718cb.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/b1a89995aed242d9b12b93495a7ebdae.png" />