Q. The speed of a projectile at its maximum height is half of its initial speed. The angle of projection is
A) $60{^\circ}$
B) $15{^\circ}$
C) $30{^\circ}$
D) $45{^\circ}$
Explanation
(a) $v^{'} = v_{0}\cos\theta$
$\frac{v_{0}}{2} = v_{0}\cos\theta$
$\cos\theta = \frac{1}{2}$
$\theta = 60{^\circ}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.