Answer
$26$
Work Step by Step
Use
$\vec{a}\cdot\vec{b}=a_{x}b_{x}+a_{y}b_{y}+a_{z}b_{z}\qquad$ (3-23)
$\vec{a}=3.0\hat{i}+5.0\hat{j}+0\hat{k}$
$\vec{b}=2.0\hat{i}+4.0\hat{j}+0\hat{k}$
$\vec{a}\cdot\vec{b}=(3.0)(2.0)+(5.0)(4.0)=6.0+20=26$
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 59: 34b
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