题目内容
如右图所
示,固定的光滑曲面两端A.B,离水平面高度分别是h1和h2,小滑块从
A端由静止滑下,经B端飞出曲面落地。那么小滑块过B端时的速率与落地时的速率之比为
( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412201395965.gif)
A.
:
B.(h1-h2):h1
C.![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122014006321.gif)
:
D.
:![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122013975264.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412201386572.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412201392872.gif)
( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241220139431850.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412201395965.gif)
A.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122013975264.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122013975260.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412201386572.gif)
B.(h1-h2):h1
C.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122014006321.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412201402185.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122013975260.gif)
D.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122014006321.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122013975264.gif)
C
略
![](http://thumb2018.1010pic.com/images/loading.gif)
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