Here's why:

* Velocity is a vector quantity, meaning it has both magnitude (speed) and direction.

* Speed is a scalar quantity, meaning it only has magnitude (how fast something is moving).

Examples:

* "The car is traveling at 60 miles per hour" describes the car's speed.

* "The car is traveling at 60 miles per hour eastward" describes the car's velocity.

Let me know if you have any other questions!