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: 13c

Answer

4kg

Work Step by Step

Looking at Disk C, we have to find all the forces acting on it. We have T2 acting upwards with a magnitude of 49N. We also have T3 acting downwards as is Mc*g. Since the disk is not moving, it has no acceleration, and therefore the net Force (F=ma) is also 0. This means the sum of all the forces must be 0. 0 = T2 - T3 - Mc*g. Since g = 9.8, we find that Mc = 4kg
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