Velocity is the rate of change of an object's position over time. It is a vector quantity, meaning it has both magnitude (speed) and direction.

Here's a more detailed breakdown:

* Magnitude: This refers to how fast an object is moving. It's typically measured in units like meters per second (m/s), kilometers per hour (km/h), or miles per hour (mph).

* Direction: This indicates the direction in which the object is moving. It could be north, south, east, west, or any combination of these directions.

Here are some key points about velocity:

* Constant Velocity: An object has constant velocity if it moves at a constant speed in a straight line.

* Changing Velocity: An object's velocity changes if its speed changes, its direction changes, or both.

* Acceleration: Acceleration is the rate of change of velocity.

Example:

A car traveling at 60 km/h eastward has a velocity of 60 km/h eastward. If the car speeds up to 80 km/h eastward, its velocity has changed. If the car then turns south, its velocity changes again, even if it maintains the speed of 80 km/h.