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⚛️ Physics  ·  NEET & JEE

Difference Between Speed and Velocity

Speed and velocity both describe how fast something moves, but velocity also tells you the direction of motion.

In short

Speed is a scalar quantity that measures how fast an object moves (magnitude only); velocity is a vector quantity that measures how fast and in which direction it moves.

Speed vs Velocity — Comparison Table

BasisSpeedVelocity
Quantity typeScalarVector
DirectionNot consideredConsidered
DefinitionDistance / timeDisplacement / time
Can be zero?Zero only if at restCan be zero even while moving (round trip)
SI unitm/sm/s

Want to understand this fully? Read the Physics notes on this chapter.

Frequently Asked Questions — Speed vs Velocity

Can speed be greater than velocity?
The magnitude of average velocity can never exceed average speed. For a round trip, speed is positive but average velocity can be zero because displacement is zero.
Is velocity a scalar or vector?
Velocity is a vector quantity because it has both magnitude and direction. Speed is a scalar with magnitude only.