| A | B |
|---|
| simple machine | a device with few, if any, moving parts that makes it easier to do work |
| mechanical advantage | the number of times a simple machine multiplies the effort force |
| lever | a simple machine consisting of a rigid bar and a pivot point |
| fulcrum | pivot point in a lever |
| wheel and axle | a simple machine that consists of a wheel that applies an effort force and a smaller axle that produces and output force |
| pulley | grooved wheel that turns by the action of a rope in the groove |
| inclined plane | a straight slanted surface that can multiply an effort force |
| screw | a simple machine made of an inclined plane wrapped around a central bar that can multiply an effort force |
| wedge | an inclined plane that changes the direction of the applied force |
| compound machine | a device that is a combination of two or more simple machines |
| efficiency | the ratio between the work done by a machine and the work put into it |
