题目内容
如图所示为一列简谐横波的图像,波速为0.2 m/s,以下结论正确的是:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241429389666782.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241429389666782.jpg)
A.振源振动的频率为0.4 Hz |
B.若质点a比质点b先回到平衡位置,则波沿x轴正方向传播 |
C.图示时刻质点a、b、c所受回复力大小之比为2∶1∶3 |
D.经过0.5 s质点a、b、c通过的路程为75 cm |
C
本题考查的是对波的图像的理解问题。由图像可知:此波的波长是
,题目中给出
,由
,可知;
,A错误;.若质点a比质点b先回到平衡位置,则波源在左边,则波沿x轴负方向传播,B错误;.由
可知图示时刻质点a、b、c所受回复力大小之比为2∶1∶3,C正确;.
,则
,所以经过0.5 s质点a、b、c通过的路程分别为70cm、75 cm、75 cm.,D选项错误。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824142938982578.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824142939263635.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824142939356490.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824142939497585.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824142939590499.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824142939497585.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824142939793489.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目