Question

At what angle with the horizontal should a ball be thrown so that the range `R` is related to the time of flight as `R = 5 T^2` ? `(Take g = 10 ms6-2)`.
A. `30^@`
B. `45^@`
C. `60^@`
D. `90^@`

Answer 1

Correct Answer - B
(b) `(R)/(T^2) = g ((sin 2 theta)/(4 sin^2 theta)) = (g)/(2) cot theta = 5 cot theta`
Given `(R)/(T_2) = 5 , Hence, 5 = 5 cot theta` or `theta = 45^@`.