题目内容
如图所示,在光滑水平面上叠放着甲、乙两物体。现对甲施加水平向右的拉力F,通过传感器可测得甲的加速度a随拉力F变化的关系如图所示。巳知重力加速度g="10" m/s2,由图线可知( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250014011826894.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250014011826894.jpg)
A.甲的质量是2kg |
B.甲的质量是6kg |
C.甲、乙之间的动摩擦因数是0.2 |
D.甲、乙之间的动摩擦因数是0.6 |
BC
试题分析:由图像可以看出,水平拉力F达到48N之前,两物体一起加速,水平拉力超过48N之后,两物体发生相对滑动,设摩擦因数为
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001401182301.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001401198754.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001401213769.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001401369475.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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