Question

A block of weight 200N rest on a rough horizontal table when the block just begin slip the pulling force found to be 40N,what coefficient of friction between the two surfaces

Answer 1

You want the static friction coefficient in this case. It tells you the mount of friction that will start the sliding pricess. Call the coefficient Us.

40 = Weight*Us

Us = 40N/200N = 0.20

Answer 2

So happy

Answer 3

This is rubbish