一质点以坐标原点 O 为中心在 y 轴方向上做简谐运动,其振动图象如图所示,振动在介质中产生的简谐波沿 x 轴正方向传播,波速 v=1m/s,t=0s 时该质点开始振动,经过 2s 后该质点停止振动,规定竖直向上为正方向,再经过 1s 后的波形图是图乙中的( )
![](https://img.xkw.com/dksih/QBM/2019/4/16/2189892924407808/2193640906678272/STEM/6c394dd7-2fc7-4706-8e3c-16990f9b4aa3.png?resizew=219)
![](https://img.xkw.com/dksih/QBM/2019/4/16/2189892924407808/2193640906678272/STEM/6c394dd7-2fc7-4706-8e3c-16990f9b4aa3.png?resizew=219)
A.![]() | B.![]() |
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更新时间:2019-04-30 16:36:45
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【知识点】 振动图像与波形图的结合
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【推荐1】一列简谐横波,某时刻的波形如图甲所示,从该时刻开始计时,波上B质点的振动图像如图乙所示,下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/1/3/2893597400580096/2893763564658688/STEM/6f5e68b8-0e88-4cb3-bba4-b8c9b71c2935.png?resizew=362)
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A.该波沿x轴正向传播 |
B.A、B两点的速度和位移有可能在某个时刻均相同 |
C.经过0.3s,B质点通过的路程大小为0.1m |
D.若此波遇到另一列简谐横波并发生稳定的干涉现象,则所遇到的波的频率为2.5Hz |
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单选题-单题
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【推荐2】一列简谐横波沿
轴传播,波长为
,周期为
,
时刻的波形如右图所示,此时质点
正沿
轴正方向运动,则
处的质点的振动图像是下列四张图中的( )
![](https://img.xkw.com/dksih/QBM/2018/1/24/1867184806969344/1900685798072320/STEM/d03b3d6327ef42e393dd7b1ead7b06c8.png?resizew=132)
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A.![]() | B.![]() |
C.![]() | D.![]() |
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