12 terms

Chapter 7 - Forces in Fluids

Mr_mills, AAA, Physical Science
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Fluid
any material that can flow and that takes the shape of its container
Pressure
the amount of force exerted on a given area; expressed in pascals
Pascal
the SI unit of pressure; equal to the force of 1 N exerted over an area of one square meter
Atmospheric Pressure
the pressure caused by the weight of the atmosphere
Density
the amount of matter in a given space; d=m/v
Pascal's Principle
change in pressure at any point in an enclosed fluid is transmitted equally to all parts of the fluid
Buoyant Force
the upward force that fluids exert on all matter; buoyant force opposes gravitational force
Archimedes' Principle
States that the buoyant force on an object in a fluid is an upward force equal to the weight of the volume of fluid that the object displaces
Bernoulli's Principle
says that an increase in the speed of the motion of fluid decreases the pressure within the fluid
Lift
an upward force on an object (such as wings) that opposes the downward pull of gravity; differences in pressure above and below the object contribute to lift
Thrust
the forward force produced by an airplane's engines; thrust opposes drag
Drag
The force that opposes or restricts motiion in a fluid; drag opposes thrust.