| A | B |
| Pressure | force divided by area |
| Pascal | 1 Newton per meter squared |
| hydraulics | devices where a force acts on a small area of liquid, producing enormous pressure in the liquid |
| Bernoulli's principle | states that the pressure in a moving stream of fluid is less than the pressure in the surrounding fluid |
| lift | upward force on the wings |
| drag | force which tends to slow an airpane down |
| buoyancy | the force of a fluid that pushes an object up |
| archimedes' principle | the buoyant force on an object is eequal to the weight of the fluid displaced by the object |
| density | mass divided by volume |