Question

When an object moves with constant velocity does its average velocity during any time interval differ from its instantaneous velocity at any instant?

Answer 1

If we interpret “constant velocity” as constant magnitude as well as the direction, then obviously the average velocity will be the same as the instantaneous velocity at any given time. In fact:-

Constant velocity (Vector) = Instantaneous velocity (Vector) at any given point in time = Average velocity (Vector)

Actually this “Constant velocity (Vector)” condition defines a straight line motion (constant direction) at same speed (i.e. magnitude of the velocity vector is also constant).