A 60.0-kg man jumps 1.00 m down onto a concrete walkway.His downward motion stops in 0.0400 seconds.If he forgets to bend his knees,what force is transmitted to his leg bones?

Question

Quizplus · Accepted Answer

The force can be calculated using the impulse-momentum theorem. The change in momentum is equal to the impulse, which is the force times the time interval. The velocity just before impact can be found using the equation for free fall: v = sqrt(2gh). Then, using F = Δp/Δt, where Δp is the change in momentum (mass times change in velocity), we find the force to be approximately 6,600 N.

A 600-Kg Man Jumps 1