Question

Under what condition s is the magnitude of average velocity of an object equal to it's average speed?

Answer 1

The average velocity and average speed is same when distance is equal to displacement

Answer 2

The body should move on a straight line without changing it's direction.Because if the body changes it's direction then there's possiblity of getting velocities positive or Negative or even 0. But speed can never be negative or zero,it will always increase.

These are the necessary condition for the magnitude of average velocity to be equal to the magnitude of average speed.

Hope it helps!