Conceptual Physics (12th Edition)

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

Chapter 5 - Think and Solve: 29

Answer

First find the resultant force of the perpendicular forces. $$(3 N)^{2}+(4 N)^{2}=F^{2}$$ $$F=5 N$$ Use Newton's second law. $a = \frac{F}{m} = \frac{5 N}{2.0 kg} = 2.5 \frac{m}{s^{2}}$.
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