题目内容
一列简谐横波在t=0时刻的波形图如图甲实线所示,若波传播的速度为10m/s,从此刻起,经0.1s波形图如图甲虚线所示,则 ( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/2014082500472444411647.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/2014082500472444411647.png)
A.这列波沿x轴正方向传播 |
B.t=0时刻质点a沿y轴正方向运动 |
C.x=2m处的质点的位移表达式为y = 0.2sin5πt(m) |
D.从t=0时刻开始质点a经0.2s通过的路程为0.4m |
D
试题分析:波传播的速度为10m/s,经0.1s波形平移的间距为:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004724460853.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004724475816.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004724507485.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250047245221285.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004724538750.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004724553718.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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