Get more lessons like this at http://www.MathTutorDVD.com Learn the average acceleration formula by means of a conceptual example. We will learn that acceleration is the rate of change of the velocity function. Because of this, the units are meters per second per second, or m/s^2. Acceleration amounts to how many meters per second you gain in velocity every second. We use this concept to solve every physics problem that involves motion of an object.