| A | B |
|---|
| Compound Machine | Machine that is a combination of two or more simple machines |
| Efficiency | ratio of the output work done by the machine to the input work done on the machine expressed as a percentage. |
| Incline Plane | simple machine that consists of a sloping surface, such as a ramp that reduces the amount of force needed to lift something by increasing the distance over which the force is applied |
| Input force | Force you exert on a machine |
| Lever | simple machine consisting of a bar free to pivot about a fixed point called the fulcrum |
| Machine | device that makes doing work easier by increasing the force applied to an object, changing the direction of an applied force, or increasing the distance over which a force can be applied. |
| Mechanical Advantage | ratio of the output force exerted by a machine to the input force applied to the machine |
| output force | Force exerted by the machine |
| power | amount of work done, or the amount of energy transferred, divided by time required to do the work or transfer the energy; measured in watts |
| pulley | simple machine that consists of a grooved wheel with a rope, chain or cable running along the groove; can be either fixed or moveable |
| screw | simple machine that consists of an inclined plane wrapped in a spiral around a cylindrical post. |
| simple machine | machine that does work with only one movement |
| wedge | simple machine that is an inclined plane with one or two sloping sides |
| wheel and axle | simple machine that consists of a shaft or axle attached to the center of a larger wheel, so that the shaft and the wheel rotate together. |
| work | transfer of energy that occurs when a force makes an object move, measured in joules. |
