Essential University Physics: Volume 1 (3rd Edition)

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

Chapter 4 - Exercises and Problems: 59

Answer

a) $F=-.4mg$ b) $F=2.4mg$ c) $F=1.4mg$

Work Step by Step

We use Newton's Second Law to find: a) $F=m(a+g)=(m)(-1.4g+g)=-.4mg$ b) $F=m(a+g)=(m)(1.4g+g)=2.4mg$ $F=m(a+g)=(m)(1.4g+0)=1.4mg$
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