题目内容
如图所示,在光滑水平面上使滑块A以2 m/s的速度向右运动,滑块B以4 m/s的速度向左运动并与滑块A发生碰撞,已知滑块A、B的质量分别为1 kg、2 kg,滑块B的左侧连有轻弹簧,求:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242009572654049.png)
(1)当滑块A的速度减为0时,滑块B的速度大小;
(2)两滑块相距最近时滑块B的速度大小.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242009572654049.png)
(1)当滑块A的速度减为0时,滑块B的速度大小;
(2)两滑块相距最近时滑块B的速度大小.
(1)
(2)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824200959231325.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824200958248396.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824200959231325.png)
试题分析:(1)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824200959714615.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824200958248396.png)
(2)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824201001461720.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824200959231325.png)
点评:本题难度较小,利用动量守恒列公式时要先规定正方向,找到初末状态列公式求解
![](http://thumb2018.1010pic.com/images/loading.gif)
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