Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 7 - Kinetic Energy and Work - Problems: 24a

Answer

Please see the work below.

Work Step by Step

We know that: $W_a=F_a.d$ We plug in the known values to obtain: $W_a=20.(0.50)cso30^{\circ}$ $Wa=8.66J$ and $W_G=F_G.d$ We plug in the known values to obtain: $W_G=(3.00)(9.80)(0.50)cos120^{\circ}=-7.35J$ Thus: $W_a+W_G=1.31J$.
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