Answer
True.
Work Step by Step
True. If one considers a particle moving along a line then the particle has two different directions: if one is $v$, then the second one is $-v$.
Calculus (3rd Edition)
by Rogawski, Jon; Adams, Colin
Published by
W. H. Freeman
ISBN 10:
1464125260
ISBN 13:
978-1-46412-526-3
Chapter 13 - Vector Geometry - 13.2 Vectors in Three Dimensions - Preliminary Questions - Page 658: 6
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