A similar but separate notion is that of velocity, which the rate of change of position. Example . If p(t) is the position of an object moving on a number line at time t (measured in minutes, say), then the average rate of change of p(t) is the average velocity of the object, measured in units per minute.
the rate at which an object changes position. but if you need a number or a formula i need to know if its on a hill. what panet. what the object is. etc. etc. etc.
