Question

A fighter jet is flying horizontally at a certain altitude with a speed of 200 ms-1. When it passes directly overhead an anti-aircraft gun, a bullet is fired from the gun, at an angle θ with the horizontal, to hit the jet. If the bullet speed is 400 m/s, the value of θ will be ____°

Answer 1

To hit the jet, $400 \cos \theta = 200$
$⇒$ $\cos \theta = \frac{1}{2}$
$⇒$ $θ = 60°$