题目内容
)图甲为一列简谐横波在某一时刻的波形图,图乙为质点P以此时刻为计时起点的振动图象。从 该时刻起 。
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/2014082500510136373587.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/2014082500510136373587.png)
A.经过0.35 s,质点Q距平衡位置的距离小于质点P距平衡位置的距离 |
B.经过0.25 s,质点Q的加速度小于质点P的加速度 |
C.经过0.15 s,波沿x轴的正方向传播了3m |
D.经过0.1 s,质点Q的运动方向沿y轴正方向 |
BC
试题分析:由图,此时P向下运动,Q点向上运动.T=0.2s,经过
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005101394785.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005101409764.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005101425875.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005101456590.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005101487673.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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