Question

A smooth block is released at rest on a 45° incline and then slides a distance 'd'. The time taken to slide in '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. $\mu_{k} = 1–\frac{1}{n^{2}}$

Answer 1

Answer: (D)

$\mu_{k} = 1–\frac{1}{n^{2}}$

Answer 2

Refer class notes