问题:
发布时间:2020-03-13
单摆摆长为L,作小角度振动时最大偏角为θ,摆球质量为m,摆球从最大偏角摆向平衡位置的过程中:( )
A.重力的冲量为![](http://picflow.koolearn.com/upload/papers/20140824/20140824122757748253.gif)
B.合力的冲量为![](http://picflow.koolearn.com/upload/papers/20140824/20140824122757763316.gif)
C.合力的冲量为![](http://picflow.koolearn.com/upload/papers/20140824/2014082412275777972.gif)
![](http://picflow.koolearn.com/upload/papers/g04/20150210/20150210093116474839.png)
D.合力的冲量为零
单摆摆长为L,作小角度振动时最大偏角为θ,摆球质量为m,摆球从最大偏角摆向平衡位置的过程中:( )
A.重力的冲量为![]() |
B.合力的冲量为![]() |
C.合力的冲量为![]() ![]() |
D.合力的冲量为零 |
参考答案: