Answer
1
Work Step by Step
The dot product of two parallel unit vectors is $1$. Thus, we obtain:
$\hat{w} \cdot \hat{w}=1$
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 3 - Vectors - Problems - Page 61: 75d
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