Speed
* Scalar: Speed only tells you how fast something is moving. It doesn't give you any information about the direction of movement.
* Examples:
* A car traveling at 60 miles per hour.
* A runner's pace of 5 miles per hour.
* A plane flying at 500 kilometers per hour.
Velocity
* Vector: Velocity tells you both how fast something is moving *and* in what direction.
* Examples:
* A car traveling at 60 miles per hour *eastward*.
* A runner's pace of 5 miles per hour *north*.
* A plane flying at 500 kilometers per hour *due west*.
Key Differences
* Direction: Velocity includes direction, while speed does not.
* Representation: Vectors are often represented by arrows where the length indicates magnitude (speed) and the arrowhead points in the direction.
Illustrative Example
Imagine two cars:
* Car A: Traveling at 50 mph eastward.
* Car B: Traveling at 50 mph westward.
Both cars have the same *speed* (50 mph). But they have different *velocities* because they are moving in opposite directions.
In Summary
Speed is a scalar quantity that measures how fast something is moving. Velocity is a vector quantity that measures both how fast something is moving and in what direction.
