Velocity

In physics, velocity is a vector quantity that represents the rate of change of an object's position over time. It describes both the speed and direction of motion.

change_in_position = final_position - initial_position
velocity = change_in_position / time_interval

Velocity is closely related to Displacement and Time. The relationship between these quantities is expressed in the fundamental equation of kinematics:

$\text{Velocity} = \frac{\text{Displacement}}{\text{Time}}$

This equation shows that velocity is the rate at which an object's position changes with respect to time. It's important to note that velocity is a vector quantity, meaning it has both magnitude (speed) and direction.

The concept of velocity is crucial in understanding Motion and forms the basis for more complex concepts like Acceleration and Momentum. It plays a significant role in various fields of physics and engineering, from classical mechanics to relativity theory.