Velocity is a vector quantity that refers to the rate at which an object changes its position. It is defined as the displacement of an object divided by the time interval over which that displacement occurs. In simpler terms, it is the speed of an object in a given direction.

Key aspects of velocity:

• Magnitude: The speed of the object (e.g., 60 km/h).
• Direction: The direction in which the object is moving (e.g., North).

Velocity is commonly expressed in meters per second (m/s), but other units such as kilometers per hour (km/h) or miles per hour (mph) are also used.

For further information, you can refer to these resources:

1. Khan Academy: What is velocity?
2. Physics Classroom: Speed and Velocity