| A | B |
|---|
| Work | Force exerted on an object that causes it to move. |
| Joule | A unit of work equal to 1 N/m |
| Machine | A device that changes the amount of force exerted or the direction in which force is exerted. |
| Input Force | The force exerted on a machine |
| Output Force | The force exerted on an object by a machine |
| Mechanical Advantage | The number of times the force exerted on a machine is multiplied by the machine. |
| Efficiency | The percentage of the input work that is converted to output work |
| Inclined Plane | A flat surface with one end higher than the other |
| Wedge | An inclined plane that moves |
| Screw | An inclined plane wrapped around a central cylinder to form a spiral |
| Lever | A rigid object that pivots about a fixed point |
| Fulcrum | The fixed point around which a lever pivots |
| Wheel and Axel | Two circular or cylindrical objects that are fastened together and rotate about a common axis |
| Pulley | A grooved wheel around which is wrapped a rope, chain or cable |
| Compound Machine | A device that combines two or more simple machines |
| Gears | Two or more wheels linked together by interlocking teeth |
