Fundamentals of Physics Extended (10th Edition)

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

Chapter 5 - Force and Motion-I - Problems: 26

Answer

310 N

Work Step by Step

The salmon weighs 85N, meaning that Fg = 85 = M *g so the mass of the fish is 8.7kg. The fish is initially moving at 2.8 m/s and it slows to a stop (0 m/s) in a distance of 11cm, or 0.11m. We use $v^2 = v_{0}^2 + 2a\Delta x$ to find the acceleration and we find that to be $a = -35.6 m/s^2$ Since F = ma then F = 310N
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