Projectile Motion BasicsEasyQuestion 5315
Question
At what pairs of angles does a projectile have the same range?
- Aθ and 2θ
- Bθ and 90°−θCorrect
- Cθ and 180°−θ
- Dθ and θ/2
Correct answer
θ and 90°−θ
Explanation
R = u²sin2θ/g. Since sin(180°−2θ) = sin2θ, both θ and (90°−θ) give the same range. E.g., 30° and 60°.