In this video, the guy is asking random people if they think the heavier ball and the lighter ball will hit the ground at the same time or not. Most people, incorrectly, say that they will hit the ground at the same time because the force of gravity on both of them is the same. This is wrong because the heavier ball will fall faster in order to reach terminal velocity, a state in which the resistance and the weight of the ball are equal. This is because when air resistance is being factored in to something falling from the air, we know that acceleration is equal to the net force of the object minus the air resistance on the object divided by the weight of the object. Therefore, the heavier the object the faster it must fall in order to reach terminal velocity, while the lighter object reaches terminal velocity more quick, and is passed by the other object.
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