题目内容
图(a)为一列简谐横波在t=0.10s时刻的波形图,P是平衡位置在x=1.0m处的质点,Q是平衡位置在x=4.0m处的质点;图(b)为质点Q的振动图象,下列说法正确的是 。(填正确答案标号,选对1个给2分,选对2个得4分,选对3个得5分,每选错1个扣3分,最低得分0分)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/2014082500492949412492.jpg)
E.质点Q简谐运动的表达式为
(国际单位)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/2014082500492949412492.jpg)
A.在t=0.10s时,质点Q向y轴正方向运动 |
B.在t=0.25s时,质点P的加速度方向与y轴正方向相同 |
C.从t=0.10s到t=0.25s,该波沿x轴负方向传播了6m |
D.从t=0.10s到t=0.25s,质点P通过的路程为30cm |
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004929510803.png)
BCE
试题分析:由Q点的振动图线可知,t=0.10s时质点Q向y轴负方向振动,选项A 错误;由波的图象可知,波向左传播,波的周期为T=0.2s,t=0.10s时质点P向上振动,经过0.15s=
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004929712393.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250049297281144.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004929744960.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250049297591859.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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