Q

If the same wedge is made rough then the time taken by body to come down becomes n times more (nt)

Then find the Coefficient of Friction between body and wedge in term of n?
Views

For the below figure

The distance S is the same.

And using this concept we get

$\mu=tan\theta\left[1-\frac{1}{n^{2}} \right ]$

Where

$\mu=$coefficient of friction

$\theta=$ Angle of inclination

n = an integer

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