If, in Q.19, coefficient of friction between `m_(1)` and the wall is `mu`,and `f_(1)` and `f_(2)` are respectively, the force of friction on `m_(1)` and `m_(2)`, then :

Options

A. `f_(1)` and `f_(2)` both are downward.
B. `f_(1)` and `f_(2)` both are downward.
C. `f_(1)` is upward and `f_(2)` upward.
D. `f_(1)` is downward and `f_(2)` upward.

Answer

B

Explanation

In upward direction .