#### 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 Option 1) 20 N Option 2) 50 N Option 3) 100 N Option 4) 2 N

As we learnt in

Motion of Block in Contact -

- wherein

Weight of the block is balanced by force of friction

$\dpi{100} \therefore$   Weight of the block  $\dpi{100} =\mu R=0.2\times 10=2N$

Correct option is 4.

Option 1)

20 N

This is an incorrect option.

Option 2)

50 N

This is an incorrect option.

Option 3)

100 N

This is an incorrect option.

Option 4)

2 N

This is the correct option.