Difference between Average Velocity & Instantaneous Velocity

Average velocity is defined as the displacement (∆x) divided by the time intervals (∆t) in which the displacement occurs.

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Average Velocity	Instantaneous Velocity
Average velocity is defined as the displacement (∆x) divided by the time intervals (∆t) in which the displacement occurs.	Instantaneous velocity is the rate of change of position for a time interval which is very small, i.e. almost zero.
Average velocity is calculated by dividing the rate of displacement by the time elapsed.	Instantaneous velocity is calculated by dividing displacement by time at that instant.
If Jack took a total of 1 hour to travel 10 km from his house to school, then his average velocity will be 10 km/hr.	In Jack’s case, on his way to school, while he is sitting and waiting for the train to pass, his instantaneous velocity will be zero. Though the instantaneous velocity was zero for a small part of the journey, the average velocity will not be zero.