| A | B |
|---|
| Machine | A device that makes work easier. |
| Simple Machine | Does work with only one movement. |
| Effort Force | The force applied to the machine. |
| Resistance Force | The force applied by the machine |
| Ideal Machine | If work input = work output. |
| Mechanical Advantage | Resistance force divided by the effort force. |
| Lever | A bar free to pivot about a fixed point. |
| Fulcrum | The fixed point of a lever. |
| Effort Arm | Part of the lever to which the effort force is applied. |
| Resistance Arm | The part of the lever that exerts the resistance force. |
| Pulley | A grooved wheel with a rope. |
| Wheel and Axle | Two wheels of different size that rotate together. |
| Inclined Plane | A ramp. |
| Screw | An inclined plane wrapped around a cylinder. |
| Wedge | An inclined plane with one or two sloping sides |
| Compound Machine | A combination of two ar more simple machines. |
| Efficiency | A measure of how much of the work put into a machine is changed to useful work put out. |
| Power | A measure of the amount of work done in a certain amount of time. |
| Watt | One joule per second. |
