Fundamentals of Physics Extended (10th Edition)

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

Chapter 8 - Potential Energy and Conservation of Energy - Problems: 4b

Answer

Work=- 1.51 Joules

Work Step by Step

$F_{g}$ acts downwards so only vertical displacements are taken into calculations. At its highest point, the ball is perpendicular with the starting point, therefore it only traveled the vertical distance of L. Since gravity acts downwards and the ball taveled upwards, the displacement must be negative. L=-.452m Work=$F_{g}$ $\times$ L---$F_{g}$= .341kg $\times$ 9.8m/$s^{2}$ $F_{g}$=3.3418 Work=3.3418 N$\times$-.425m Work=- 1.51 Joules
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