| A | B |
|---|
| pressure | the result of a force distributed over an area |
| pascal | the SI unit of pressure, equal to 1 newton per square meter |
| fluid | a substance that assumes the shape of its container |
| hydraulic system | a device that uses pressurized fluid acting on pistons of different sizes to change a force |
| lift | an upward force due to a pressure difference between the top and bottom of a wing |
| buoyancy | the ability of a fluid to exert an upward force on an object placed in it |
| buoyant force | the upward force which acts in the opposite direction of gravity |
| Archimedes' principle | the principle by which the buoyant force on an object is equal to the weight of the fluid displaced by the object |
| area | amount of surface space of any object |
| psi | pounds per square inch |
| N/square meter | standard unit of force in the metric system |
| psi | standard pressure units used in the U.S. |
