题目内容
如图所示,在水平传送带上有三个质量分别为m1、m2、m3的木块1、2、3, 1和2及2和3间分别用原长为L,劲度系数为k的轻弹簧连接起来,木块与传送带间的动摩擦因数均为μ,现用水平细绳将木块1固定在左边的墙上,传送带按图示方向匀速运动,当三个木块达到平衡后,1、3两木块之间的距离是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250006174253290.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250006174253290.jpg)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
B
试题分析:已木块3为研究对象,分析受力有
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000617534700.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000617565760.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000617581830.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000617596972.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250006176121348.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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A.![]() |
B.![]() |
C.![]() |
D.![]() |