What is a drag force?

Drag force: the force exerted by the fluid (air or water) on the object moving through the fluid

The force is dependent on the motion of the object, the properties of the object, and the properties of the fluid that the object is moving through.

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What is terminal velocity?

Terminal velocity: the constant velocity that is reached when the drag force equals the force of gravity


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How do they work together?

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Terminal velocity depends on the drag force.

When light objects with large surface areas are falling, the drag force has a substantial effect on their motion, and they quickly reach terminal velocity.