Basic purpose of this lecture is to presentation on Acceleration; explain with Graphs and Problems. It is a tutorial based lecture. General rule of Acceleration: if object is increasing speed acceleration is in the same direction as motion and if object is slowing down acceleration is in the opposite direction. Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity. This lecture representing all acceleration graphically.