⚛️ Physics · Motion in a Plane · NEET & JEE

In uniform circular motion the speed is constant, but the ___ keeps changing:

Answer: velocity.

A velocity
B mass
C radius
D time period

Correct answer: A. velocity

Explanation: The direction of motion changes continuously, so the velocity (a vector) changes.

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.

Read the full Motion in a Plane notes →

In uniform circular motion the speed is constant, but the ___ keeps changing:

Concept context

More Motion in a Plane questions