Physics (10th Edition)

Published by Wiley
ISBN 10: 1118486897
ISBN 13: 978-1-11848-689-4

Chapter 6 - Work and Energy - Problems: 19

Answer

a) 3.1 $\times$ $10^{3}$ J b) 2.2 $\times$ $10^{2}$ J

Work Step by Step

a) Work done = $\Delta$$E_{k}$ = 0.5m$v^{2}$ - 0.5m$u^{2}$ = 0.5(7.3)($29^{2}$) - 0 $\approx$ 3.1 $\times$ $10^{3}$ J b) Work done = $\Delta$$E_{k}$ = 0.5m$v^{2}$ - 0.5m$u^{2}$ = 0.5(0.0026)($410^{2}$) - 0 $\approx$ 2.2 $\times$ $10^{2}$ J
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