1. Assuming that energy conversion in the pole vault is approximately 100% effic

Question

1. Assuming that energy conversion in the pole vault is approximately 100% efficient, estimate the max height that a pole vaulter can jump (assume the center of gravity starts out at 1m above the ground) if his max running speed is 9m/s. Note that the energy conversion efficiency is technique dependent and that energy is temporarily stored and then returned to the vaulter during the vault.

2. A 150-pound man trips and falls, landing on his hip. His center of gravity free falls 36 inches before he impacts the floor. Determine the average force of the floor on the hip during impact if the force acts for 0.05 seconds to stop the fall.

Explanation / Answer

Conserve energy for the first one and second one.

For the second, you conserve energy to get the final velocity when he hits the ground and then use the equation F* (time touch) = mv equation

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.