A 75 kg man jumps from a window 2.0 m above a sidewalk. The acceleration of gravity is 9.81 m/s² . a) What is his speed just before his feet strike the pavement? Answer in units of m/s. b) If the man jumps with his knees ana an- kles locked, the only cushion for his fall is approximately 0.44 cm in the pads of his feet. Calculate the magnitude of the average force exerted on him by the ground in this situation. Answer in units of N.
A 75 kg man jumps from a window 2.0 m above a sidewalk. The acceleration of gravity is 9.81 m/s² . a) What is his speed just before his feet strike the pavement? Answer in units of m/s. b) If the man jumps with his knees ana an- kles locked, the only cushion for his fall is approximately 0.44 cm in the pads of his feet. Calculate the magnitude of the average force exerted on him by the ground in this situation. Answer in units of N.
Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter6: Motion In Two Dimensions
Section6.3: Relative Velocity
Problem 27PP
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