Answer
$r_{x}\approx13.0m$
Work Step by Step
We solve for the x component of $\vec{r}$:
$\vec{r}_{x}=\mid \vec{r} \mid cos\theta=(15m)cos(30^{\circ})\approx13.0m$
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 57: 2a
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