Air resistance increases with surface area, but also with velocity, because a higher velocity means an object is displacing a greater volume of air per second. When the acceleration due to gravity is balanced by the force of air resistance, the falling object reaches terminal velocity, and does not fall any faster. read more
As a falling object accelerates through air, its speed increases and air resistance increases. While gravity pulls the object down, we find that air resistance is trying to limit the object's speed. Air resistance reduces the acceleration of a falling object. It would accelerate faster if it was falling in a vacuum. read more