If I go then one hair further, it will start to slide, and so that's the case when this equals mg sine theta, mg and so you lose your mg, and you find that mu s equals tangent theta.

如果在向上一点，就会下滑，当这个等于mgsinθ,时，就会发生，所以约掉，会发现mu，s=tanθ

youdao

If I go then one hair further, it will start to slide, and so that's the case when this equals mg sine theta, mg and so you lose your mg, and you find that mu s equals tangent theta.

如果在向上一点，就会下滑，当这个等于mgsinθ,时，就会发生，所以约掉，会发现mu，s=tanθ

youdao