| 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 or mixture that flows and ahs no shape of its own |
| hydraulic system | a device that uses a pressurized fluid acting on pistons of different sizes to increase 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 | an upward force acting on an object in a fluid |
| Archimedes' principal | the equivalence of the buoyant force on an object and the weight of the fluid displaced by the object |
