Speed

* Definition: How fast something is moving.

* Measurement: Distance traveled over a certain time (e.g., miles per hour, meters per second).

* Focus: Only considers the magnitude (how much).

* Example: A car traveling at 60 mph.

Velocity

* Definition: How fast something is moving and in what direction.

* Measurement: Distance traveled over a certain time, including direction (e.g., 60 mph north, 10 meters per second east).

* Focus: Considers both magnitude and direction.

* Example: A car traveling at 60 mph north.

Key Differences

* Direction: Velocity includes direction; speed does not.

* Change: Velocity can change even if speed remains constant. Imagine a car going around a circular track at a constant speed. Its velocity is constantly changing because the direction of motion is changing.

Think of it this way:

* Speed: A car's speedometer tells you the speed.

* Velocity: You need both the speedometer and a compass to understand the car's velocity.