题目内容
(10分)光滑的水平面上,用轻质弹簧相连的质量均为m=2kg的A、B两物块都以6m/s的速度向右运动,弹簧处于原长。质量为mC=4kg的物块C静止在A和B的正前方,如图所示;B与C碰撞后(碰撞时间很短)二者粘在一起,在以后的运动中,试求:
(1)B与C碰撞后,物体B的速度是多少?
(2)弹簧的弹性势能的最大值是多少?![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241221070463208.jpg)
(1)B与C碰撞后,物体B的速度是多少?
(2)弹簧的弹性势能的最大值是多少?
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241221070463208.jpg)
(1)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122107046401.gif)
(2)12J
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824122107046401.gif)
(2)12J
(1)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241221070771165.gif)
(2)弹性势能最大时各物体速度都相同
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241221070934603.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241221070771165.gif)
(2)弹性势能最大时各物体速度都相同
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241221070934603.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
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