gravity

From your link

quote:

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Gravitation, or gravity, is the natural phenomenon by which physical bodies appear to attract each other with a force proportional to their masses.

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and

quote:

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Equivalence principle
The equivalence principle, ... expresses the idea that all objects fall in the same way. The simplest way to test the weak equivalence principle is to drop two objects of different masses or compositions in a vacuum, and see if they hit the ground at the same time.

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If the attractive force of gravity is proportional to the mass of two bodies, why does an object of greater mass not fall quicker?

Well yes now I do remember it. I also have some vague recollection of having graduated from high school. I have a mind like an etch-a-sketch. While this keeps things fresh and interesting I sometimes feel like I have covered this ground before.