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
Sorry, my taste in music doesn't go back any further than the 1960's. Music wntten before then is just history to me.
抱歉，我喜欢的音乐是1960年以后的，在这以前的音乐对我来说只是历史。
Sorry, my taste in music doesn't go back any further than the 1960's. Music wntten before then is just history to me.
抱歉，我喜欢的音乐是1960年以后的，在这以前的音乐对我来说只是历史。
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