Distinguish between uniform and non uniform velocity??

UNIFORM VELOCITY :body is said to have uniform velocity if it covers equal distance in equal intervals of time in a particular direction, however, the time intervals may be small. ... Examples of the body moving with variable

Explanation:

NON UNIFORM VELOCITYWhen an object covers unequal distances in equal intervals of time in a specified direction, or if the direction of motion changes, it is said to be moving with a non-uniform or variable velocity. e.g., revolving fan at a constant speed has variable velocity.

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s