Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 5 - Force and Motion-I - Problems - Page 117: 14a

Answer

2N

Work Step by Step

When the block is sitting on the surface, it has a weight of 3N, meaning that it exerts a force of 3N on the surface and the surface exerts an equal and opposite force on the block. When a force of 1N is applied to the block, the two forces need to be added so we have 3N-1N = 2N for the force the block exerts on the surface.
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