A `2 kg` block is pressed against a rough wall by a force `F = 20 N` as shown in figure .Find acceleration of the block and force of friction acting on it .`(Take g = 10 m//s^(2))`

Options

A. `4m//sec^(2)` downward, `12N` upward
B. `2m//sec^(2)` downward, `6N` upward
C. `12m//sec^(2)` downward, `4N` upward
D. `8m//sec^(2)` downward, `12N` upward

Answer

A

Explanation

`f_(s) =mu_(s) mg, W gt f_(s),f_(k) =mu_(k) mg, a =(F_("net"))/(m)` .