College Physics (4th Edition)

Published by McGraw-Hill Education
ISBN 10: 0073512141
ISBN 13: 978-0-07351-214-3

Chapter 2 - Section 2.5 - Interaction Pairs: Newton's Third Law of Motion - Practice Problem - Page 43: 2.9

Answer

The interaction partner is the contact force exerted on the floor by the chest. This force has a magnitude of 870 N and it is directed at an angle of $59^{\circ}$ below the rightward horizontal.

Work Step by Step

The floor exerts a contact force on the chest. This contact force has a magnitude of 870 N and it is directed at an angle of $59^{\circ}$ above the leftward horizontal. By Newton's third law, there is an interaction partner of this force. The interaction partner has the same magnitude and it is directed in the opposite direction. The interaction partner is the contact force exerted on the floor by the chest. This force has a magnitude of 870 N and it is directed at an angle of $59^{\circ}$ below the rightward horizontal.
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