题目内容
物体A B C 均静止在同一水平面上,它们的质量分别为mA、 mB、 mC,与平面的动摩擦因数分别为μA、μB 、μC,用平行于水平面的拉力F分别拉物体A、B、C所得加速度a与F的关系图线如图,对应的直线甲、乙、丙所示,甲、乙 直线平行,则以下说法正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250000573122562.jpg)
①μA<μB mA=mB ②μB>μC mB>mC
③μB=μC mB>mC ④μA<μC mA<mC
A.①② B.②④ C.③④ D.①④
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250000573122562.jpg)
①μA<μB mA=mB ②μB>μC mB>mC
③μB=μC mB>mC ④μA<μC mA<mC
A.①② B.②④ C.③④ D.①④
D
试题分析:质量m的物体在水平拉力F作用下受到的滑动摩擦力为
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000057328489.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000057343673.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000057359737.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000057390382.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000057406377.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000057421610.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000057437593.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目