题目内容
如图所示,将一质量为m的小球从空中O点以速度v0水平抛出,飞行一段时间后,小球经过空间P点时动能为
,不计空气阻力,则下列结论不正确的是
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250013319951343.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001331979384.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250013319951343.jpg)
A.小球经过P点时竖直分速度为![]() |
B.从O点到P点,小球的高度下降![]() |
C.从O点到P点过程中,小球运动的平均速度为![]() |
D.从O点到P点过程中,小球运动的平均速度为![]() |
C
试题分析:小球经过空间P点时,
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001332135517.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001332151454.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001332166758.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001332182624.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001332197681.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001332026860.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001332291526.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001332041849.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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