Difference between Average Speed and Instantaneous Speed

 

The below table lists the difference between Average Speed and Instantaneous Speed.

Average Speed	Instantaneous Speed
It is defined as the total distance travelled divided by the total time elapsed.	It is defined as the speed at a particular instant of time.
It is constant.	It is not constant.
Measured by calculating the speed for an entire journey.	It is measured by a speedometer.
Example: A car travelling with a speed of 60 kmph. Thus, the average speed of the car is 60 km an hour.	Example: A car travelling at a certain speed at an instant of time can be given by a speedometer.