A student standing on a stationary skateboard tosses a textbook with a mass of mb = 1.9 kg to a friend standing in front of him. The student and the skateboard have a combined mass of mc = 99 kg and the book leaves his hand at a velocity of vb = 3.39 m/s at an angle of 38° with respect to the horizontal. Write an expression for the magnitude of the velocity of the student, vs, after throwing the book.  Calculate the magnitude of the velocity of the student, vs, in meters per second.   What is the magnitude of the momentum, pe, which was transferred from the skateboard to the the Earth during the time the book is being thrown (in kilogram meters per second)?

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter10: Systems Of Particles And Conservation Of Momentum
Section: Chapter Questions
Problem 62PQ: An astronaut out on a spacewalk to construct a new section of the International Space Station walks...
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  A student standing on a stationary skateboard tosses a textbook with a mass of mb = 1.9 kg to a friend standing in front of him. The student and the skateboard have a combined mass of mc = 99 kg and the book leaves his hand at a velocity of vb = 3.39 m/s at an angle of 38° with respect to the horizontal.

Write an expression for the magnitude of the velocity of the student, vs, after throwing the book. 

Calculate the magnitude of the velocity of the student, vs, in meters per second. 

 What is the magnitude of the momentum, pe, which was transferred from the skateboard to the the Earth during the time the book is being thrown (in kilogram meters per second)? 

 

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