如图所示,质量为的纸箱在拉力F的作用下沿水平地面运动,拉力,

如图所示,质量为的纸箱在拉力F的作用下沿水平地面运动,拉力,方向与水平面的夹角为,纸箱与水平地面的动摩擦因数为。(取),求:

1.纸箱受到的支持力和摩擦力的大小。

2.纸箱由静止开始运动,内的位移多大?  

 

答案

 

1.

2.

解析:略

 

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