Study of motion_______________________________________________________________________________________________________________________________________________________________________________________________________________________7.Average speed and instantaneous speedThe instantaneous speed of an object is not to be confused with the average speed. Average speed is a measure of the total distance travelled in a given period of time; it is sometimes referred to as the distance per time ratio. Suppose that during your trip to school, you travelled a distance of 10 km and the trip lasted 0.2 hours (12 minutes). The average speed of your car could be determined as:On the average, your car was moving with a speed of 50 kilometres per hour. During your trip, there may have been times that you were stopped and other times that your speedometer was reading 65 km/h. Yet, on average, you were moving with a speed of 50 km/h.If a moving object always moves at the same speed, moves with constant speed, the instantaneous and average speeds coincide. In this case the movement is uniform.