Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 4 - Reading Check Questions (Comprehension): 26

Answer

6 N, downward. Zero newtons.

Work Step by Step

The 10-N force due to gravity (also known as the weight, of course) points downward, and if the object is falling, the 4-N force due to air resistance points upward. The net force is 6 N, downward. If the force due to air resistance is 10 N, it cancels the weight and the net force is zero. This is discussed on pages 65-66.
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