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 5 - Force and Motion - Exercises and Problems - Page 136: 37

Answer

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Work Step by Step

a) See the figures below, and recall that: $F_n\rightarrow$ Normal force. $F_G\rightarrow$ Gravitational force (the weight of the object). $f_k\rightarrow$ Kinetic friction force. $T\rightarrow$ Tension force. b) The acceleration here is directed to the left since the net force is in the negative $ x$-direction. c) The direction of the speed is toward the tension force, as we see in the figure below, which means toward the left. The object is speeding up in the negative $x$-direction. d) A car pulls a box with a rope toward the west and the rope is unstretchable. See the second figure below.
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