Distinguish between uniform velocity and non-uniform (variable) velocity.

(N/A) Uniform velocity: $A$ body is said to have uniform velocity if it covers equal displacements in equal intervals of time,regardless of how small these time intervals may be.
Non-uniform (variable) velocity: $A$ body is said to have non-uniform velocity if it covers unequal displacements in equal intervals of time,or if its direction of motion changes.