Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 5 - Section 5.1 - Using Newton’s Second Law - Got It?: 5.1

Answer

c)

Work Step by Step

It is equal to the box's weight. After all, it is at a 45 degree angle to the slope, and gravity is 45 degrees to the slope. As a result, the components of each force are equal, making the overall forces equal as well. However, it is important to note that if the slope is not 45 degrees, these components would no longer be at the same angle, so they would no longer be equal.
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