Question

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

• A. $0^{\circ }$
• B. $30^{\circ }$
• C. $45^{\circ }$
• D. $60^{\circ }$
• E. $90^{\circ }$

Answer 1

Answer: (C)

Given $H=4R$
$\therefore \frac{u^2\sin 2\theta }{g}=4\times \frac{u^{2}si{n}^2\theta }{2g}$
or $\tan \theta =1$ or $\theta =45^{\circ }$