⚛️ Physics · Motion in a Plane · NEET & JEE

Two vectors of magnitudes 5 and 12 act at right angles to each other. The magnitude of their resultant is:

Answer: 13.

A 7
B 17
C 15
D 13

Correct answer: D. 13

Explanation: For perpendicular vectors the resultant is √(5<sup>2</sup> + 12<sup>2</sup>) = √(25 + 144) = √169 = 13.

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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Two vectors of magnitudes 5 and 12 act at right angles to each other. The magnitude of their resultant is:

Concept context

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