Answer
The correct answer is
(C). $60^\circ$
Work Step by Step
We know that
$v=\frac{1}{2}v_{\circ}$
$\implies \frac{1}{2}v_{\circ}=v_{\circ}cos\theta$
$\implies cos\theta=0.5$
$\implies \theta=cos^{-1}(0.5)$
$\theta=60^{\circ}$
Physics Technology Update (4th Edition)
by Walker, James S.
Published by
Pearson
ISBN 10:
0-32190-308-0
ISBN 13:
978-0-32190-308-2
Chapter 4 - Two-Dimensional Kinematics - Problems and Conceptual Exercises - Page 105: 26
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