Average speed is measured in units of distance per time and the average speed formula looks like this. U 12at. Speed Versus Velocity The average speed of an object is defined to be the. . For the latter you can find the average speed using the following formula. For example if you measured distance in meters and time in seconds. The instantaneous speed is the limit of the. The average speed of an object is defined to be a. The average speed is the total distance traveled by the object in a particular time interval. U 12 v - u from equation 1. The average speed of an object tells you the average rate atwhich it covers distance. The speed at a given point in time. Average speed determined over an infinitesimally small time interval. What is Average Speed. Distance it travels divided by the time it takes. The average speed of an object in an interval of time is the distance travelled by the o...