1. The problem statement, all variables and given/known data: A parachutist whose total mass is 100kg is falling at 50m/sec when his parachute opens. His velocity drops to 10 m/sec in a vertical displacement of 40m. What force was exerted by his parachute? 2. Relevant equations: F = ma Fg = m(9.8) This is my first physics course that I am taking and am not very good with the subject as of yet. I in fact have no idea what to do. I've looked at other similar problems on this forums but I could not understand the solution. I am seeking for a learning experience here so that I would be able to solve other problems as well. Please, any help would be greatly appreciated.