题目内容
如图3所示,皮带传动装置中,右边两轮是连在一起共轴转动,图中三轮半径分别为,
,![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140533359453.png)
;
、
、
三点为三个轮边缘上的点,皮带不打滑。
、
、
三点的线速度分别为
、
、
,角速度分别为
、
、
,向心加速度分别为
、
、
,则下列比例关系正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082414053626010148.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140533296420.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140533359453.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140533405455.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140533499300.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140533561309.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140533624313.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140533499300.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140533561309.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140533624313.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140534061302.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140534107329.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140534154336.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140534201336.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140534232369.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140534248372.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140534497314.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140534560348.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140534919357.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082414053626010148.png)
A.![]() | B.![]() | C.![]() | D.![]() |
BD
设A点线速度为v,A点角速度
,B点线速度为v,角速度为
,角速度之比为
,B对;设B点角速度为w,C点角速度也为w,B点线速度为2wr,C点线速度为3wr,线速度之比为2:3,C错;
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140537243620.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140537274646.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824140537321629.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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