题目内容
(8分)如图11所示,一半径为R的光滑半圆形轨道AB固定在水平地面上,一个质量为m的小球以某一速度从半圆形轨道的最低点A冲上轨道,当小球将要从轨道最高点B飞出时,小球对轨道的压力为3mg(g为重力加速度),求:
(1)小球在半圆形轨道最高点时的加速度大小;
(2)小球的落地点C离A点的水平距离。![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241212463163127.jpg)
(1)小球在半圆形轨道最高点时的加速度大小;
(2)小球的落地点C离A点的水平距离。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241212463163127.jpg)
(1)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121246332367.gif)
(2)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121246347429.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121246332367.gif)
(2)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121246347429.gif)
对小球 B点的分析
(2分)
(2分)
(2分)
(2分)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121246379643.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121246394562.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121246332367.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121246441501.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121246441396.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121246472430.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824121246347429.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
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