题目内容
如图所示,甲、乙两完全一样的小车,质量都为M,乙车内用绳吊一质量为
M的小球。当乙车静止时,甲车以速度v0与乙车相碰,碰后一起向右运动。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241316108982279.png)
小题1:两车刚碰后的共同速度为__________;
小题2:小球相对小车摆至最高点时,小球和两车速度相等,大小为____________;
小题3:小球能够上升的最大高度为___________。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131610851338.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241316108982279.png)
小题1:两车刚碰后的共同速度为__________;
小题2:小球相对小车摆至最高点时,小球和两车速度相等,大小为____________;
小题3:小球能够上升的最大高度为___________。
小题1:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131610929460.png)
小题2:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131610945477.png)
小题3:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131610976573.png)
甲乙碰撞过程中,由动量守恒定律得
,解得
。对两车和小球组成的系统应用动量守恒定律得
,解得
。由系统机械能守恒得
,解得![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131611709700.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131611007756.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131611038540.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131611069988.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131611116589.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241316116621412.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131611709700.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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