Final answer:
If velocity is constant, the average velocity equals the instantaneous velocity at any point in time. Since there is no change in velocity, both terms describe the same value throughout the motion.
Step-by-step explanation:
If the velocity is constant (unchanging), then the average velocity will be equal to the instantaneous velocity at any point in time. This is because when velocity is constant, both the average velocity and instantaneous velocity remain the same throughout the journey. Therefore, the correct answer is (B) equal to the instantaneous velocity at any point in time.
Instantaneous velocity refers to the velocity of an object at a particular moment in time, and it matches average velocity when the velocity is constant over time. The magnitude of the average velocity would not differ from the magnitude of the instantaneous velocity under constant velocity conditions, dispelling other options such as being greater than or less than the instantaneous velocity.