A 70.0-kg man and a 55.0-kg woman hold- ing a 2.50-kg purse on ice skates stand facing each other. (a) If the woman pushes the man backwards so that his final speed is 1.50 m/s, with what average force did she push him, assum- ing they were in contact for 0.500 s? (b) What is the woman’s recoil speed? (c) If she now throws her 2.50-kg purse at him at a 20.0° angle above the horizontal and at 4.20 m/s relative to the ground, what is her subsequent speed?
A 70.0-kg man and a 55.0-kg woman hold- ing a 2.50-kg purse on ice skates stand facing each other. (a) If the woman pushes the man backwards so that his final speed is 1.50 m/s, with what average force did she push him, assum- ing they were in contact for 0.500 s? (b) What is the woman’s recoil speed? (c) If she now throws her 2.50-kg purse at him at a 20.0° angle above the horizontal and at 4.20 m/s relative to the ground, what is her subsequent speed?
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter9: Linear Momentum And Collisions
Section: Chapter Questions
Problem 103AP: Three skydivers are plummeting earthward. They are initially holding onto each other, but then push...
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A 70.0-kg man and a 55.0-kg woman hold- ing a 2.50-kg purse on ice skates stand facing each other. (a) If the woman pushes the man backwards so that his final speed is 1.50 m/s, with what average force did she push him, assum- ing they were in contact for 0.500 s? (b) What is the woman’s recoil speed? (c) If she now throws her 2.50-kg purse at him at a 20.0° angle above the horizontal and at 4.20 m/s relative to the ground, what is her subsequent speed?
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