Classical Mechanics

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Drag Force: Air Resistance vs. Gravity Magnitudes


When an object is dropped, it is subject to two forces: air resistance and gravity. As the object falls it accelerates until reaching terminal velocity and falls with a constant velocity thereafter.

Prior to reaching terminal velocity, the magnitude of the air resistance force acting on the object is

the magnitude of the gravitational force acting on the object. As the object falls the force of air resistance

until it is