A smooth block is released at rest on a \( 45^{\circ} \) incline slide is ' \( n \) ' times as m...

Описание: A smooth block is released at rest on a \( 45^{\circ} \) incline slide is ' \( n \) ' times as much to slide on rough incline than on a smooth incline. The coefficient of friction is
(A) \( \mu_{s}=\sqrt{1-\frac{1}{n^{2}}} \)
(B) \( \mu_{s}=1-\frac{1}{n^{2}} \)
(C) \( \mu_{k}=\sqrt{1-\frac{1}{n^{2}}} \)
(D) \( \mu_{k}=1-\frac{1}{n^{2}} \)
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