Answered: Starting from rest, a 58.0 kg woman…

Starting from rest, a 58.0 kg woman jumps down to the floor from a height of 0.750 m, and immediately jumps back up into the air. While she is in contact with the ground during the time interval 0

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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Question

Starting from rest, a 58.0 kg woman jumps down to the floor from a height of 0.750 m, and immediately jumps back up into the air. While she is in contact with the ground during the time interval
0 <t< 0.800 s, the force she exerts on the floor can be modeled using the function
F = 9,200t – 11,500t²
where F is in newtons and t is in seconds.
(a)
What impulse (in N: s) did the woman receive from the floor? (Enter the magnitude. Round your answer to at least three significant figures.)
N.S
(b) With what speed (in m/s) did she reach the floor? (Round your answer to at least three significant figures.)
m/s
(c) With what speed (in m/s) did she leave it? (Round your answer to at least three significant figures.)
m/s
(d) To what height (in m) did she jump upon leaving the floor?
m

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