题目内容
以速度v0水平抛出一球,某时刻其竖直分位移与水平分位移相等,以下判断错误的是( )
A.竖直分速度等于水平分速度 | B.此时球的速度大小为![]() |
C.运动的时间为![]() | D.运动的位移是![]() |
BCD
设竖直分速度为v,则
,小球的和速度为
,A错;B对;由
,C对;竖直位移![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241346100331167.png)
,D对;
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134609830912.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134609908681.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134609971799.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241346100331167.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134609628643.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.竖直分速度等于水平分速度 | B.此时球的速度大小为![]() |
C.运动的时间为![]() | D.运动的位移是![]() |