Answer
$a \times c = 12$
Work Step by Step
We can find the magnitude of $a \times c$:
$a \times c = ac~sin~\phi$
$a \times c = (ac)~(\frac{b}{c})$
$a \times c = ab$
$a \times c = (3)(4)$
$a \times c = 12$
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: 33c
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