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 02. The weight of the block is
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Answer 1

Answer:

2 N

Explanation:

Frictional force balances the weight of the block.

$F_{f}$ = μN

⇒ $F_{f}$ = (0.2)(10) = 2 N

As the block is in equilibrium, (As it is stationary) The weight of the block must cancel out the frictional force,

According to Newton's second law, $F_{net}$ = ma

⇒ W - $F_{f}$ = m(0)

⇒ W = $F_{f}$

Hence weight of the block is 2 N.

Thanks !