| A | B |
|---|
| lever | a simple machine with a fulcrum, an effort arm, and a resistance arm |
| fulcrum | the point where a lever is supported |
| effort arm | the side of a lever you use a force on |
| resistance | the object moved by a lever |
| resistance arm | the end of the lever that moves the resistance |
| mechanical advantage | the number of times a machine multiplies the effort |
| inclined plane | a flat surface that is tilted |
| pulley | a simple machine made of a wheel and an axle |
| axle | a rod that a wheel turns on |
| fixed pulley | a pulley that does not move |
| movable pulley | a pulley that moves |
| moment | the turning effect of a force |
| ideal M.A. | the M.A. a machine would have if there were no friction |
| actual M.A. | the M.A. a machine really has |
| efficiency | the percent of useful work obtained from a machine |
| vacuum | an empty space |
| weight | the pull of gravity on an object |
| mass | the amount of material in an object |
| pressure | force on a certain amount of surface |
| manometer | an instrument used to measure pressure |
| dense | heavy for its volume |
| density | mass of a certain volume of a material |
| Archimedes' Principle | the fact that the loss of weight of an object in water is equal to the weight of the displaced water |
| displaced water | the amount of water pushed out of the way by an object |
