Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 12 - Exercises and Problems - Page 214: 21


$W =483.3 \ N$

Work Step by Step

We must consider the force caused by the board, which we know has a center of mass of 1.5 meters from the scale. Thus, we set the force on the scale equal to the forces caused by both the board and the person on the scale: $210(3) = (3.4)(9.81)(1.5) + 1.2W \\ W =483.3 \ N$
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