What is velocity?
To define the fastness of an motion , we need to find how fast the space coordinates ( position vector ) of a particle relative to a fixed reference point changes with time . It is called as " Velocity ".
Velocity is also defined as the rate of change of displacement .
Velocity is a vector quantity . It depends on both magnitude and direction of the object .
When a particle moves , it's positive vector
It is measured in
It has dimensional formula -
or simply -