Speed
* Definition: Speed is the rate at which an object moves, regardless of its direction. It tells you how fast something is going.
* Example: A car traveling at 60 miles per hour.
* Scalar: Speed is a scalar quantity because it only has magnitude (a numerical value). It doesn't contain information about the direction of movement.
Velocity
* Definition: Velocity is the rate at which an object changes its position, including both its speed and its direction. It tells you how fast something is going *and* where it's heading.
* Example: A car traveling at 60 miles per hour eastward.
* Vector: Velocity is a vector quantity because it has both magnitude (speed) and direction.
Key Differences
* Direction: Speed ignores direction; velocity includes it.
* Representation: Speed is represented by a single number (e.g., 60 mph). Velocity is represented by both a number and a direction (e.g., 60 mph east).
* Changes in Motion: If only the speed changes (e.g., accelerating), the velocity changes. If only the direction changes (e.g., turning), the velocity changes even if the speed remains constant.
An Analogy
Think of a car driving around a racetrack. The car might maintain a constant speed, but its velocity is constantly changing because its direction is always changing.
