题目内容
在固定斜面上的一物块,受到一外力
的作用,
平行于斜面向上,若要物块在斜面上保持静止,
有一定的取值范围。已知其最大值为
,最小值为
(
),由此可求出:( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250011485352301.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001148442302.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001148442302.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001148442302.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001148488333.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001148504353.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001148520473.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250011485352301.png)
A.斜面的倾角 |
B.物体和斜面间的最大静摩擦力 |
C.物块对斜面的正压力 |
D.物块受的重力 |
B
试题分析: 对滑块受力分析,受重力、拉力、支持力、静摩擦力,设滑块受到的最大静摩擦力为
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001148566304.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001148582830.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001148598872.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001148629638.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001148644942.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001148691728.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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