Question

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

​

Answer 1

Explanation:

Given data:

Force, F = 10N

Coefficient of friction, ∆ = 0.2

We know that

F = mg

= Weight.

When the horizontal block is at stationary, then the normal reaction acts perpendicular to the horizontal block.

Therefore,

Weight, mg = Normal reaction.

So,

Normal reaction, R = 10 N Ans.