| A | B |
| The force exerted on a surface divided by the total area over which the force is exerted | Pressure |
| A unit of pressure equal to one newton per square meter | Pascal |
| Any substance that can flow and easily change shape | Fluid |
| The rule that when force is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid | Pascal's principle |
| A system that multiplies force by transmitting pressure from a small surface area through a confined fluid to a larger surface area | Hydraulic system |
| The upward force exerted by a fluid on a submerged object | Buoyant force |
| The rule that the buoyant force on an object is equal to the weight of the fluid displaced by that object | Archimedes' principle |
| The rule that a stream of fastmoving fluid exerts less pressure than the surrounding fluid | Bernoulli's principle |