The velocity vector represents both speed and direction of an object's motion. It is a vector quantity because it has magnitude (speed) and direction.
A change in position defined as the straight line distance between initial and final positions, along with its direction.
The rate at which an object's velocity changes over time. It can involve speeding up, slowing down, or changing direction.
Refers to the numerical value or size associated with a physical quantity, such as speed or displacement.