题目内容
一摆长为L的单摆,在悬点正下方(L-L′)的P处有一钉子,如图9-4-6所示,这个单摆的周期是(两边摆角均很小)( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241205490931335.jpg)
图9-4-6
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241205490931335.jpg)
图9-4-6
A.T=2π![]() | B.T=2π![]() |
C.T=2π(![]() ![]() | D.T=π(![]() ![]() |
D
此单摆以摆长L和L′各运动半个周期,即为此变形单摆的周期.
![](http://thumb2018.1010pic.com/images/loading.gif)
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A.T=2π![]() | B.T=2π![]() |
C.T=2π(![]() ![]() | D.T=π(![]() ![]() |