Answer: zero.
- A zero
- B a maximum
- C equal to g
- D a large negative
Correct answer: A. zero
Explanation: The vertical velocity is momentarily zero at the top of the trajectory.

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.