Two objects of the same shape (say balls) fall through the earth's atmosphere. For simplification, let's say that the air density is the same (some average sea level value) despite altitude change. One ball has considerably bigger mass than the other, but besides that, they're the same. Will the heavier ball accelerate faster even before the lighter ball reaches it's terminal velocity or will they accelerate at the same rate until that point, and only after the lighter ball one tops at it's terminal velocity and stops accelerating will the heavier ball win the "race" and continue accelerating further. Some math/formulas behind the explenation would be helpful. Very much thanx in advance!