* Velocity is not just the change of speed, but the change of speed and direction.

Think of it like this:

* Speed is how fast something is moving (like 60 miles per hour).

* Velocity is how fast something is moving *and* in what direction (like 60 miles per hour north).

Examples:

* A car driving at a constant speed on a straight road has a constant velocity.

* A car driving at a constant speed around a curve has a changing velocity because its direction is changing.

* A ball thrown straight up has a changing velocity because both its speed and direction are changing.

Key Point: Velocity is a vector, meaning it has both magnitude (speed) and direction.