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

Published by Pearson

# Chapter 1 - Concepts of Motion - Conceptual Questions: 5

#### Answer

Positive $a_y$

#### Work Step by Step

The velocity vectors of the particle are getting shorter and shorter. Also, the velocity vectors are pointing downwards. Therefore, the acceleration vector is pointing in the other direction (upwards). By our convention, $a_y$ is positive.

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