Definition related to motion

Position - A place, coordinate, point where any object placed.
If any object change its position then it has two positions - Initial position & Final position.

Distance-The difference of final and initial position. It is denoted by 'd'. It is a scalar quantity.

Displacement - The distance in a particular direction. It is the minimum distance between initial and final positions. It is denoted by x. It is a vector quantity.

 Speed- It is the rate of change of distance.
    v =d/t
It is a scalar quantity.

Velocity - It is the rate of change of displacement.
     v = x/t
It is a vector quantity.

Acceleration - It is the rate of change of velocity.
         a = v/t
It is a vector quantity.

Note:-
1. Scalar quantity - The physical quantities which have only magnitude no any direction.
Distance, temperatures, pressure, speed, work, energy etc.
2. Vector quantity - The physical qualities which have both magnitude and direction.
Displacement, velocity, acceleration, force etc.
3. Tensor quantity - The physical qualities which behave as both scalar and vector quantities.
Angular velocity, angular acceleration, angular moment etc.