Answer: 4.
- A 4
- B 1
- C 2
- D 0.5
Correct answer: A. 4
Explanation: Setting R = H gives u²sin2θ/g = u²sin²θ/2g, which simplifies to tanθ = 4.
Projectiles at equal speed: range is maximum at 45°, and complementary angles (30° and 60°) share the same range. Image: Cmglee, CC BY-SA 3.0, via Wikimedia Commons.
Concept context
Vectors, projectile motion, uniform circular motion, and relative velocity - the foundation of 2D kinematics for NEET and JEE.