Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)

Published by Pearson
ISBN 10: 0321740904
ISBN 13: 978-0-32174-090-8

Chapter 11 - Work - Exercises and Problems - Page 305: 42

Answer

Part A: 225 J, Part B: 225 N, Part C: 6.8 kW These answers match those in the back of the book.

Work Step by Step

Part A: Work is equivalent to force times displacement, and the change in kinetic energy. Substituting in all the known variables (displacement, mass, initial and final velocity) it is possible to calculate the value of work. Part B: Since the displacement is one meter, the value for work is equal to force. Part C: The formula for power is work times time.
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