Im doing a little investation.. nothing too detailed. Its into the way parachutes fall ect. Im dropping parachutes out of a window with differant weights on, up to a certain weight where the kenetic energy becomes too high. Then im going to try to design a better shape to reduce the KE of the impact for that weight. I know the surface area of my parachutes, the weight of the load hanging off the parachute, i also know the distance it is falling, and the time it took it to fall. Im not too sure how to work it out at the moment i havent put enough thought into it obviously. I need to know Kenetic energy of the impact, the velocity it hits the ground with, and maybe its acceleration. Can i work it out from this? I was told something about stokes' law, the GPE and the amount of force disapated on its journy, the remaining would be the KE of the impact. But im not sure what equations or how to use them. I kinda need the advice asap!!! If anyone could give me a bit of advice with what im trying to do i'd be greatful. Thanks alot!