I'm trying to figure out how much energy needs to be absorbed, radiated or displaced from an object falling from various heights. To make this clear, the "item" is a person so the weight can vary from 70-350lbs and the height let's say 60-3500 ft. Obviously the speed at the end will determine a lot and needs to be reasonable (IDK what that is, maybe 2-3m/s just to to start with). In the scenario I'm looking at, I think the fall rate needs to be constant or somehow decreased the last 10-15m to an acceptable speed So if the height is 1000m and weight is 100kg and descent speed is a constant 10m/s, the person needs to be slowed to 2 or 3m/s over the last 15m. I'm trying to come up with a formula to calculate the energy generated from the first 985m and how much at the last 15m. I'd like to be able to swap out number to play around and see how the numbers impact energy generated/liberated. I need to calculate how much heat would be generated by the 985m descent as friction would be used to keep it from accelerating - then I need to calculate the same for the last 15m. Can someone help with finding the proper calculations?