Speed
* Definition: How fast an object is moving.
* Measurement: Only considers the magnitude (amount) of movement.
* Example: A car traveling at 60 miles per hour.
Velocity
* Definition: How fast an object is moving *and* in what direction.
* Measurement: Considers both magnitude and direction.
* Example: A car traveling at 60 miles per hour *north*.
Key Differences:
* Direction: Velocity includes direction, while speed does not.
* Changing Direction: Even if speed is constant, a change in direction means velocity is changing.
* Vector vs. Scalar: Velocity is a vector quantity (magnitude and direction), while speed is a scalar quantity (magnitude only).
Analogy:
Think of it like walking around a track:
* Speed: You might be walking at a constant speed of 3 miles per hour.
* Velocity: Your velocity changes constantly as you change direction around the track.
In Summary:
Speed tells you how fast something is moving, while velocity tells you how fast and in what direction something is moving.
