Question

A uniform metal chain is placed on a rough table such that on end of chain hangs down over the edge of the table when one-third of its length hangs over the edge, the chain starts sliding, Then, the coefficient of static friction is?

Answer 1

In equilibrium $f=mg$

$\frac{2}{3}\mu mg=\frac{1}{3}mg$

$\mu =\frac{1}{2}$