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Question: The horizontal range is four times the maximum height attained by a projectile. The angle of project...

The horizontal range is four times the maximum height attained by a projectile. The angle of projection is

A

90o90^{o}

B

60o60^{o}

C

45o45^{o}

D

30o30^{o}

Answer

45o45^{o}

Explanation

Solution

R=4Hcot⁡θ,R = 4H\cot\theta, if R = 4H then cot⁡θ=1⇒θ=45∘\cot\theta = 1 \Rightarrow \theta = 45{^\circ}