Question

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

Answer 1

The correct option is D 2 N

The limiting force of friction acting on the block $=f=\mu N$

When the block is balanced at the limiting condition,

Weight $=f$$=\mu N=0.2\times 10N=2N$