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Forces in Fluids

Vocabulary TermDefinition
Archimedes' principle The principle that states that the buoyant force on an object in a fluid is an upward force equal to the weight of the volume of the fluid that the object displaces.
atmospheric pressure The pressure caused by the weight of the atmosphere.
Bernoulli's principle The principle that states that as the speed of a moving fluid increases, it's pressure decreases.
buoyant force The upwards force that fluids exert on all matter; buoyant force opposes gravitational force.
density The amount of matter in a given space; mass per unit volume. m/V
drag The force that opposes or restricts motion through a fluid; drag opposes thrust.
fluid Any material that can flow and takes the shape of its container.
lift An upward force on an object (such as a wing) caused by differences in pressure above and below the object; lift opposes the downward pull of gravity.
pascal The SI unit of pressure; equal to the force of of one newton exerted over an area of one square meter.
Pascal's principle The principle that states that a change in pressure at any point of an enclosed fluid is transmitted equally to all parts of that fluid.
pressure The amount of force exerted on a given area.
thrust The forward force produced by an airplane's engines; thrust opposes drag.
Created by: pthomas
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