Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 3 - Kinematics in Two Dimensions; Vectors - General Problems - Page 73: 69

Answer

a) $2.51\frac{m}{s}$; $61.4^o$ b) $(3.6m, 6.6m)$

Work Step by Step

a) $v=\sqrt{(2.20\frac{m}{s})^2+(1.20\frac{m}{s})^2}=2.51\frac{m}{s}$ $\theta=\arctan\Big(\frac{(2.20\frac{m}{s})^2}{(1.20\frac{m}{s})^2}\Big)=61.4^o$ b) $x=(1.20\frac{m}{s})(3s)=3.6m$ $y=(2.20\frac{m}{s})(3s)=6.6m$ $(3.6m, 6.6m)$
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