Calculus (3rd Edition)

Published by W. H. Freeman
ISBN 10: 1464125260
ISBN 13: 978-1-46412-526-3

Chapter 14 - Calculus of Vector-Valued Functions - 14.5 Motion in 3-Space - Preliminary Questions - Page 744: 5

Answer

(b) parallel.

Work Step by Step

Since the curvature of the straight line is zero, then the normal vector is zero. So, the acceleration has only the tangential component. So, the acceleration points in the direction of velocity vector; that is, the acceleration and velocity vectors are parallel.
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