Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

Published by Pearson
ISBN 10: 0133942651
ISBN 13: 978-0-13394-265-1

Chapter 1 - Concepts of Motion - Conceptual Questions - Page 28: 4


Negative $a_x$

Work Step by Step

Because the velocity vectors get longer for each time step, the object is speeding up as it travels to the left. The acceleration vector then is pointing in the same direction as the velocity, so the acceleration vector is also pointing to the left. Because left is negative in our convention, $a_x$ is negative.
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