Fundamentals of Physics Extended (10th Edition)

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

Chapter 2 - Motion Along a Straight Line - Problems: 5b

Answer

x = -2

Work Step by Step

The position is given by the equation $ x = 3t - 4t^2 + t^3 $ where x is in meters and t is in seconds To find the position at t = 2 s we need to find x(2), or in other words, plug in 2 for t in the equation. This gives us: $ x = 3(2) - 4*(2)^2 + (2)^3 = 6 - 4*4 + 8 = 6-16+8 = -2 $ Therefore x = -2
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