题目内容
平抛物体的初速度为v0,当水平方向分位移与竖直方向分位移相等时,下列不正确的是[ ]
A.运动的时间![]() | B.瞬时速率![]() |
C.水平分速度与竖直分速度大小相等 | D.位移大小等于![]() |
C
平抛运动水平位移
,竖直位移
,当两者相等时,即
时可得
,A正确。位移
,D正确。水平分速度
,竖直分速度
,C错。瞬时速率
,B对。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124408818492.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124408834646.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124408865400.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124408569583.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241244089121060.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124408943420.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124408959624.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124408990833.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.运动的时间![]() | B.瞬时速率![]() |
C.水平分速度与竖直分速度大小相等 | D.位移大小等于![]() |