题目内容
如图所示,一横波的波源在坐标原点,x轴为波的传播方向,
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115442114193.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115442114202.gif)
(1)从图示位置再经多长时间波传到
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115442146216.gif)
(2)波传到
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115442146216.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115442114202.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241154421776608.jpg)
(1)4m/s(2)10cm
(1)如图所示,根据图像,波的波长![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115442192383.gif)
波速为![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115442208521.gif)
波传的到Q点用的时间![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115442224561.gif)
(2)质点振动的周期:![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115442239245.gif)
P质点开始向下振动,波经P点传到Q点的时间为
周期
则此时质点P的位移为10cm
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115442192383.gif)
波速为
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115442208521.gif)
波传的到Q点用的时间
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115442224561.gif)
(2)质点振动的周期:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115442239245.gif)
P质点开始向下振动,波经P点传到Q点的时间为
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115442270223.gif)
则此时质点P的位移为10cm
![](http://thumb2018.1010pic.com/images/loading.gif)
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