Physics Technology Update (4th Edition)

Published by Pearson
ISBN 10: 0-32190-308-0
ISBN 13: 978-0-32190-308-2

Chapter 7 - Work and Kinetic Energy - Problems and Conceptual Exercises - Page 211: 9

Answer

(a) positive (b) $7.8KJ$

Work Step by Step

(a) We know that the work done is positive as the force acts in the direction of motion. (b) The work done can be determined as $W=Fd$ We plug in the known values to obtain: $W=(120)(65)$ $W=7800J=7.8KJ$
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