Speed
* Definition: How fast an object is moving.
* Measurement: Only considers magnitude (how much).
* Units: meters per second (m/s), kilometers per hour (km/h), miles per hour (mph), etc.
* Example: A car traveling at 60 mph.
Velocity
* Definition: How fast an object is moving *and* in what direction.
* Measurement: Considers both magnitude and direction.
* Units: Same as speed, but with a direction specified (e.g., 60 mph north).
* Example: A car traveling at 60 mph *east*.
Key Differences
* Direction: Velocity includes direction, while speed does not.
* Type of Quantity: Speed is a scalar quantity (only magnitude). Velocity is a vector quantity (both magnitude and direction).
Analogy
Think of a car traveling on a highway. If you only know the car's speed, you know how fast it's going, but not where it's heading. Knowing the car's velocity tells you both how fast it's going and which direction it's traveling.
Important Note: If an object's speed is constant, but its direction changes, its velocity is changing. This is because velocity is a vector quantity, and a change in either magnitude or direction affects the velocity.
