1. The problem statement, all variables and given/known data You are standing on a bathroom scale in an elevator in a small building. The elevator starts from rest and moves with a velocity given by v(t) = (3 m/s^2)t + (0.2 m/s^3)t^2. If your mass is 64 kg what is your weight at t=4.0 s as recorded by the scale (in N) 2. Relevant equations v(t) = (3 m/s^2)t + (0.2 m/s^3)t^2 The acceleration function is the derivative of the acceleration function so I guess: A(t) = .4t + 3 I think this is needed: F = (ma) 3. The attempt at a solution So I plug t=4 into the acceleration equation A(t) = .4t + 3 and get 4.6. Then F = m*a so 64*4.6 but that gives me 294N but the answers in the question are 627N, 1254N, 333N, 124N and 922N (the correct answer is 922N btw) I would really appreciate any help on this problem.