题目内容
一列简谐横波沿x轴正方向传播,位于原点的质点的振动图象如图12-2-8甲所示.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241415369085753.jpg)
(1)该振动的振幅是________cm;
(2)振动的周期是________s;
(3)在t等于
周期时,位于原点的质点离开平衡位置的位移是________cm.
图乙所示为该波在某一时刻的波形图,A点位于x=0.5 m处.
(4)该波的传播速度是________m/s;
(5)经过
周期后,A点离开平衡位置的位移是________cm.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241415369085753.jpg)
(1)该振动的振幅是________cm;
(2)振动的周期是________s;
(3)在t等于
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824141536939303.png)
图乙所示为该波在某一时刻的波形图,A点位于x=0.5 m处.
(4)该波的传播速度是________m/s;
(5)经过
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824141537002338.png)
(1)8 (2)0.2 (3)0 (4)10 (5)-8
由振动图象可以看出该振动的振幅为8 cm,振动周期为0.2 s,在t等于
周期时,原点的质点刚好回到平衡位置,因而位移为零.由图乙可以看出,该波的波长为2 m,则波速v=
=
m/s=10 m/s.经过
周期后,A点刚好到达负的最大位移处,因而位移为-8 cm.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824141536939303.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824141537485427.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824141537532432.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824141537002338.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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