The buoyancy force is a net force and is the result of the water exerting pressure on the object. Pressure is force per unit area. Go to the other great Wikianswer in the Related Questions section...
The weight of an object has no effect on the buoyant force; however the density does. Simply put, if a material is denser (heavier for the same volume) than water, it will sink. If less dense, it...