题目内容
(1)平台与斜面体间的水平距离 d1;
(2)小球在斜面上的运动时间t;
(3)弹簧压缩过程中的最大弹性势能Ep.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241149529995130.gif)
(1)0.4m (2)
(3)0.5J
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114953015210.gif)
(1)小球到达斜面顶端时
…………………………(1分)
…………………………(1分)
…………………………(1分)
解得:
…………………………………………(1分)
(2)在 B 点,
……………………………………(1分)
小球由 B 到 C 过程中,
……………………(2分)
…………(1分)
……………………(1分)
解得:
…………………………………………(1分)
(3)小球在水平面上的运动过程中,
……………………(3分)
解得:
……………… …………………………(2分)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114953030201.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114953061166.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114953077156.gif)
解得:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114953093169.gif)
(2)在 B 点,
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114953124218.gif)
小球由 B 到 C 过程中,
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114953217198.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114953233305.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114953264172.gif)
解得:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114953264156.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114953015210.gif)
(3)小球在水平面上的运动过程中,
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114953295484.gif)
解得:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114953311165.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
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