# How to find acceleration with a force, a mass, and coefficient of sliding friction?

Based on Newton's Third Law, you will be pushed back by the wall with the same 200 N force. Name this fore F. Then the net force on you would be $F_{net}=F-f$ where $f=\mu N=\mu mg$ is the sliding frictional force.
Your acceleration is then $a=\frac {F_{net}}{m}$.