Fundamentals of Physics Extended (10th Edition)

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

Chapter 4 - Motion in Two and Three Dimensions - Problems - Page 84: 16c

Answer

The velocity is never zero.

Work Step by Step

$v = (6.0t-4.0t^2)\hat{i}+ 8.0\hat{j}$ The x component of velocity changes over time. However, the y component of velocity does not change over time. Since the y component of velocity is constant and non-zero, the velocity is never zero.
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