题目内容
两刚性球a和b的质量分别为
和
、直径分别为
和
(
>
)。将a、b球依次放入一竖直放置、内径略小于(
+
)的平底圆筒内,如图6所示。设a、b两球静止时对圆筒侧面的压力大小分别为
和
,筒底所受的压力大小为
.已知重力加速度大小为g。若所有接触面都是光滑的,则
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241430070313542.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143005954395.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143006048405.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143006110368.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143006157397.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143006110368.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143006157397.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143006110368.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143006157397.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143006594326.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143006734348.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143006859302.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241430070313542.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
A
对两刚性球a和b整体分析,竖直方向平衡可知F=(ma+mb)g、水平方向平衡有f1=f2,A 对;
![](http://thumb2018.1010pic.com/images/loading.gif)
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A.![]() | B.![]() |
C.![]() | D.![]() |