⚛️ Physics · Motion in a Plane · NEET & JEE

For a particle in uniform circular motion, the ratio of its average speed to the magnitude of its average velocity over half a revolution is:

Answer: π/2.

A 1
B π/2
C 2/π
D π

Correct answer: B. π/2

Explanation: Average speed = πr/(T/2); average velocity magnitude = 2r/(T/2); ratio = π/2.

Projectile trajectories launched at 15, 30, 45, 60, 75 and 90 degrees at the same speed, each annotated with range R, maximum height H and time of flight T, with coloured dots marking equal time intervals

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.

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For a particle in uniform circular motion, the ratio of its average speed to the magnitude of its average velocity over half a revolution is:

Concept context

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