A 72.4 man steps off a platform 3.02 above the ground. He keeps his legs straight as he falls, but at the moment his feet touch the ground his knees begin to bend, and, treated as a particle, he moves an additional 0.620 before coming to rest.
calculate the force the ground exerts on him while he is slowing down. Express this force in newtons.
What is the magnitude of the reaction force to the force.