Consider the situation as shown in the figure. Choose the correct option.

Options

A. The friction force on the block is `1 N if m = 0.1 kg`
B. The friction on the block is `5 N if m = 1.0 kg`
C. Both `(1)` and `(2)` are correct
D. Both `(1)` and `(2)` are incorrect

Answer

C

Explanation

`N = 10`
`f_(max) = mu N = 0.5 xx 10 = 5 N`
If `m = 0.1 kg , mg = 1 N`
`1 N lt 5 N` , the block will not move
Friction `f = 1 N`
If `m = 1 kg , mg = 10 N`
`10 N gt 5 N` , the block will move
Friction `f = 5 N`