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: 13b

Answer

1kg

Work Step by Step

Looking at Disk B, we need to find all the forces acting on it. The Disk has a Force, T1 pulling up on it, T2 is pulling down on it, as is the weight of the disk, Mb*g. Since the disk is not moving, we know that the acceleration of the disk is 0 and since F=ma, the Force is also 0. Therefore, the forces must all equal zero, so we have 0 = T1 - T2 - Mb*g. We know T1 = 58.8N and T2 = 49N so we have: 0 = 58.8N - 49N - Mb*g and since g = 9.8, Mb = 1kg
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