⚛️ Physics · Motion in a Plane · NEET & JEE

Car A moves east at 3 m/s and car B moves north at 4 m/s. The speed of A relative to B is:

Answer: 5 m/s.

A 1 m/s
B 7 m/s
C 5 m/s
D √7 m/s

Correct answer: C. 5 m/s

Explanation: v_AB = v_A − v_B = (3, −4); magnitude = √(9 + 16) = 5 m/s.

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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Car A moves east at 3 m/s and car B moves north at 4 m/s. The speed of A relative to B is:

Concept context

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