A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is 0.2. The weight of the block is-
(a) 20 N
(b) 50 N
(c) 100 N
(d) 2 N
The correct option is d) 2N
Frictional force balances the weight of the body
Frictional force f = μN = mg
f= 0.2 X 10 = 2N
Therefore, weight of the block mg= 2N