Question

when you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, the time of the impact is about 10 times more than for a stiff-legged landing. in this way the average force your body experiences is reduced by

Answer 1

Force is proportional to rate of change of momentum, therefore, force is inversely proportional to the time taken to come to a stop.

So if you increase the time by 10 times, then the force to experience will be reduced by 10 times.