V avg average velocity ms. Average velocity is displacement change in position divided by the time of travel v D x D t x f x 0 t f t 0. Example of calculating speed and velocity.
You might think of the instantaneous speed as the speed that the speedometer reads at any given instant in time and the average speed as the average of all the speedometer readings during the course of the trip.
The average speed of a body in a certain time interval is the distance covered by the body in that time interval divided by time. That is we have to find the value of x_1 at time t_1 and x_2 at time t_2. So if a particle covers a certain distance s in a time t_1 to t_2 then the average speed of the body is. V avg xf-x0tf-t0.