Light and Heavy Represented by the Graph Editor

Here is a representation of a light object and a heavy object contacting with a set of stairs. The two graphs represent the different volume and inertia of an object. This also represents the slow in and slow out.

Heavy

heavy requires a more subtle bounce when contacting with a surface the object will spend less time in the air after it contacts the ground.  This is all represented as a graph that shows the stages of the heavy ball falling down a flight of steps. Heavy objects require more inertia which means more momentum. As the object gradually speeds up the ball becomes harder to stop when it reaches the bottom. As  the ball hits the surface the ball holds for one frame before it bounces up also representing weight. 

Light

Unlike the heavy object, light objects bounce higher and remain in the air for longer. As the ball bounces down the stairs it remains the same height of the bounce until it hits bottom once, It then decreases height as the inertia pulls it down.