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 6 - Dynamics I: Motion Along a Line - Exercises and Problems: 12

Answer

(a) The block speeds up from 0 to 1. (b) The block continues to speed up from 1 to 2.

Work Step by Step

(a) The block has a net force $F_x$ that points in the positive x-direction. Therefore, $a_x$ points in the positive x-direction. Therefore, the block speeds up from 0 to 1. (b) Although the magnitude of the force decreases, the block still has a net force $F_x$ that points in the positive x-direction. Therefore, $a_x$ points in the positive x-direction. Therefore, the block continues to speed up from 1 to 2.
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