An average person(80kg) wants to perform a superhero landing from a height of 30m (a fall from this height means you hit the ground at 24.5 m/s). Let's assume that it takes them 0.5 s to come to a complete stop (This stopping time is generous as they stop almost instantly).

Calculate the change in momentum of the person.

It takes about 4000 N to break a femur bone (thigh bone), should this person attempt a superhero landing from that height? (What is the impact force felt by the person?)