Simple Description

A force that acts against anything moving through a gas or a liquid

Further Detail

Can also be called air resistance or friction, depending on the situation. Drag gets bigger when the object goes faster, which often means that the object has a maximum speed it can reach (called the "terminal velocity"). Drag is usually caused by particles of the fluid getting in the way of the object trying to move through it.

Related Words:

• Terminal velocity
• Friction
• Fluid

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