题目内容
(6分)如图所示为一列沿x轴正向传播的简谐横波在t=0时刻的图象,振源周期为1s.以下说法正确的是( )(仅有一个正确选项)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250012054613267.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250012054613267.png)
A.质点b的振幅为0 |
B.经过0.25s,质点b沿x轴正向移动0.5m |
C.从t=0时刻起,质点c比质点a先回到平衡位置 |
D.在t=0时刻,质点a、c所受的回复力大小之比为![]() |
D
试题分析: 图示时刻质点b的位移为0,但其振幅为4cm,故A错误.简谐横波沿
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001205492266.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001205492266.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001205524389.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001205524389.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001205555464.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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