题目内容
如图12为一列简谐横波在t1=0时刻的波形图象,此时波中质点M正处于平衡位置,运动方向沿y轴负方向,到t2=0.55s时质点M恰好第三次到达y轴正方向最大位移处. 试求:
(1)该波传播方向;
(2)该波波速大小。
(1)该波传播方向;
(2)该波波速大小。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241352385998344.png)
(1)负方向传播(2)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135238989873.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135238989873.png)
(1)该波沿x轴负方向传播 (2分)
(2)该波的周期满足:
(2分)
解得T=0.2s (2分)
由图知波长
(2分)
则波速
(2分)
(2)该波的周期满足:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135239098709.png)
解得T=0.2s (2分)
由图知波长
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135239192594.png)
则波速
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824135238989873.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目