Question

A block of mass 1 kg is pressed against a wall by applying a horizontal force of 10N on the block. If the coefficient of friction between the block and the wall is 0.5, magnitude of the frictional force acting on the block is

• A. $9.8N$
• B. $0.98N$
• C. $1.96N$
• D. $5N$

Answer 1

The correct option is D $5N$

Weight of the block=$10N$

Limiting friction on block =$\mu mg=10\times 0.5=5N$

As limiting friction is less than weight of block so $5N$ friction will act on the block .