Motion is a change in position.
If one object A changes its position with reference to an object B positioned at a fixed place (Reference point), Object A is said to be in motion. This change in position is caused due to different parameters.
The rate at which an object changes its position is termed as speed. Velocity is a vector quantity that measures both the speed of the object and its direction. Acceleration is the rate of change in velocity. Distance is the total path-length of the object performing motion. Displacement is the shortest distance between two points of motion path ( the difference between final position and initial position) and it is a vector quantity. If an object changes its position, it is said to be in motion.
