题目内容
如图所示,半径为R的竖直光滑圆轨道内侧底部静止着一个光滑小球,现给小球一个冲击使其在瞬时得到一个水平初速v0,若v0≤
,则有关小球能够上升到最大高度(距离底部)的说法中正确的是:( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250012291262530.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001229111338.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250012291262530.png)
A.一定可以表示为v02/2g | B.可能为R/3 |
C.可能为R | D.可能为5R/3 |
BC
试题分析:小球在运动过程中,机械能守恒,则有:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001229111338.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001229158356.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001229158356.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001229158356.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001229204327.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001229204327.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.一定可以表示为v02/2g | B.可能为R/3 |
C.可能为R | D.可能为5R/3 |