How to find acceleration. With only Force of friction?? 1. The problem statement, all variables and given/known data While traveling down between floors at a constant speed, a passenger has a weight of 800 N. During the acceleration to stop the elevator, the passenger experiences an apparent weight of 1000 N. Calculate the acceleration of the elevator. I am confussed because there is two forces of friction. There is no time or velocity. But the velocity is constant. 2. Relevant equations I don't have an equation to find acceleration with only Force of friction. 3. The attempt at a solution Gravity? 9.8 m/s ^ 2 ?