题目内容
如图所示为某一皮带传动装置,主动轮的半径为r1,从动轮的半径为r2,已知主动轮做顺时针转动,转速为n,转动过程中皮带不打滑.下列说法正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250041591068081.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250041591068081.png)
A.从动轮做顺时针转动 | B.从动轮做逆时针转动 |
C.从动轮的转速为 ![]() | D.从动轮的转速为![]() |
BC
试题分析:因为主动轮做顺时针转动,所以从动轮做逆时针转动,选项B正确,A错误;两轮边缘的线速度相等,则
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004159168815.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004159121408.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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