Definition:Velocity

Definition
The velocity of a body $$M$$ is defined as the first derivative of the displacement of $$M$$ from a given point of reference.

Colloquially, it is described as the rate of change of position.

It is important to note that as displacement is a vector quantity, then it follows from Derivative of a Vector that so is velocity.

Dimension
Velocity has dimension $$L T^{-1}$$.

Also see

 * Displacement
 * Position


 * Speed


 * Acceleration


 * Linear Momentum