* Speed is how fast something is moving. It's a scalar quantity, meaning it only has magnitude (a numerical value).
* Velocity is how fast something is moving and in what direction. It's a vector quantity, meaning it has both magnitude and direction.
Here's an analogy:
Imagine you're driving a car.
* Speed is how fast the speedometer reads (e.g., 60 mph).
* Velocity is 60 mph *eastward* (including direction).
Key differences:
* Direction: Velocity includes direction, speed does not.
* Change in direction: A change in direction means a change in velocity, even if speed remains constant. For example, a car traveling in a circle at a constant speed has a changing velocity because its direction is constantly changing.
In summary:
* Speed: How fast
* Velocity: How fast and in what direction
