Physics (10th Edition)

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

Chapter 1 - Introduction and Mathematical Concepts - Problems - Page 22: 29

Answer

a) M = P + Q -> $45.607017 cm$ b) K = 2P - Q -> $39.39543121 cm$

Work Step by Step

a block = 4cm Vector P: 5 blocks right, 2 blocks up Vector Q: 6 blocks right, 5 blocks down M = P + Q = 11 blocks right, 3 blocks down 11^2 + 3^2 = M^2 121 + 9 = M^2 M^2 = 130 M = sqrt (130) blocks M = sqrt (130) * 4cm M = 45.607017cm K = 2P - Q = 4 blocks right, 9 blocks up 4^2 + 9^2 = K^2 16 + 81 = K^2 K^2 = 97 K = sqrt (97) blocks K = sqrt (97) * 4cm K = 39.39543121 cm
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