1. The problem statement, all variables and given/known data Zach, whose mass is 78 kg, is in an elevator descending at 11 m/s. The elevator takes 3.2 s to brake to a stop at the first floor. What is Zach's weight before the elevator starts braking? What is Zach's weight while the elevator is braking? 2. Relevant equations F = mg F = ma ?? 3. The attempt at a solution What is Zach's weight before the elevator starts braking? I was thinking.... F = mg So F = (78kg)*(11m/s) ???? The second question i was completely clueless on.... but an idea of mine was... F = ma a = (11m/s)/(3.2s) = 3.4375 m/(s^2) F = (78kg)(3.4475) ????