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: 8

Answer

The particle's position is positive. It's velocity is negative. The particle's acceleration is also negative.

Work Step by Step

The particle position is above zero on the y-axis, so its position is positive. The particle is moving down, so its velocity is negative. The particle’s speed is increasing as it moves in the negative direction, so its acceleration vector points in the same direction as its velocity vector (i.e., down). Thus, the acceleration is also negative.
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