Question

A horizontal force of 10 newton is necessary to just hold a block stationary against a wall, The coefficient of friction between the lock and the wall is 0.2. The weight of block is

• A. 50 N
• B. 100 N
• C. 2 N
• D. 20 N

Answer 1

The correct option is C 2 N

Friction force balance the wight of the block

friction force $f=\mu N=0.2\times 10=2N$

2N must be the wight of the block so that it is in equilibrium

Hence the correct option is C