题目内容
如图所示,A、B是两个摩擦传动轮(不打滑),两轮半径大小关系为RA=2RB,则两轮边缘上的( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241537052862080.jpg)
A.角速度之比ωA:ωB=2:1
B.周期之比TA:TB=2:1
C.转速之比nA:nB=2:1
D.向心加速度之比aA:aB=2:1
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241537052862080.jpg)
A.角速度之比ωA:ωB=2:1
B.周期之比TA:TB=2:1
C.转速之比nA:nB=2:1
D.向心加速度之比aA:aB=2:1
B
试题分析:两轮子由于属于共线关系,所以线速度相同,由
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153705317529.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153705489659.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824153705613723.png)
点评:难度较小,求解此类问题首先明确是共线关系还是共轴关系,再由基础公式求解
![](http://thumb2018.1010pic.com/images/loading.gif)
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