题目内容
如图所示,长木板放置在水平面上,一小物块置于长木板的中央,长木板和物块的的质量均为m,物块与木板间的动摩擦因数为μ,木板与水平面间动摩擦因数为
,已知最大静摩擦力与滑动摩擦力大小相等,重力加速度为g。现对物块施加一水平向右的拉力F,则木板加速度大小a可能是
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250034412131986.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003441182381.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250034412131986.jpg)
A.![]() | B.![]() | C.![]() | D.![]() |
CD
试题分析:若木板相对物块没动,木板和物块一起做匀加速直线运动,整体水平方向的受力为:拉力F和地面的摩擦力f,则其加速度为:a=
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003441306625.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003441291762.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825003441275546.png)
所以C正确。
![](http://thumb2018.1010pic.com/images/loading.gif)
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