Q. The angle of projection at which the horizontal range and maximum height of projectile are equal is
A) $45{^\circ}$
B) $\theta = \tan^{- 1}{(0.25)}$
C) $\theta = \tan^{- 1}4\ $or$\ (\theta = 76{^\circ})$
D) $60{^\circ}$
Explanation
(c) $R = 4H\cot\theta$
When $R = H$ then $\cot\theta = 1/4 \Rightarrow \theta = \tan^{- 1}{(4)}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.