A doctor is testing how much impact force does a 75 kg athlete has on his knees when he jumps. On his first jump, he landed with stiffed legs, and it took 0.4 m/s for him to stop. The athlete’s velocity just before he hits the ground was 7.5 m/s. Compute for the impact force. How long will it take for the same athlete to stop when this time he experienced an ave. force of 280 N. with the same velocity just before he hits the ground?

A doctor is testing how much impact force does a 75 kg athlete has on his knees when he jumps. On his first jump, he landed with stiffed legs, and it took 0.4 m/s for him to stop. The athlete’s velocity just before he hits the ground was 7.5 m/s. Compute for the impact force. How long will it take for the same athlete to stop when this time he experienced an ave. force of 280 N. with the same velocity just before he hits the ground?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter9: Momentum And Its Conservation

Section9.2: Conservation Of Momentum

Problem 23PP

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