Question

A given object takes n times as much time to slide down a ${45}^o$ rough incline as it takes to slide down a perfectly smooth ${45}^o$ incline. The coefficient of kinetic friction between the object and the incline is given by

• A. $(1-\frac{1}{n^2})$
• B. $\frac{1}{1-n^2}$
• C. $\sqrt{(1-\frac{1}{n^2})}$
• D. $\sqrt{\frac{1}{1-n^2}}$

Answer 1

Answer: (A)

$(1-\frac{1}{n^2})$

Hence the correct option is A.