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Pressure
Force per unit area.
Fluid
Any substance that can flow (liquid or gas).
Terminal Velocity
The constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity.
or
The greatest velocity a falling object can achieve.
Air Resistance
Force (Friction) that opposes the motion of objects that move through the air.
Free-Body Diagram
A diagram showing all the forces acting on an object.
Pascal
A unit of pressure equal to one newton per square meter (Pa).
