1. The problem statement, all variables and given/known data Henry gets into an elevator on the 50th floor of a building and it begins moving at t=0s The figure shows his apparent weight over the next 12s. http://img520.imageshack.us/img520/8404/knightfigure0530ry3.th.jpg [Broken] What is Henry's mass? How far has Henry traveled at t =12s 2. Relevant equations F=ma w=mg weight apparent = w(1+ a/g) 3. The attempt at a solution Well so far, all I know is that the elevator is moving down since the apparent weight has gone up. I have no idea how to approach the problem and I have tried using the third formula that I have listed but no luck. Do I even use the apparent weight equation? Because I need the acceleration, and no information has been given on that.