Science Ch. 15
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16 terms
Terms | Definitions |
|---|---|
 Work | force acting through a distance |
| Power | rate at which work is done, or the amount of work per unit of time. |
| Watt | The unit of power |
| Machine | An instrument that makes work easier |
| Work Input | The work that goes into the machine. |
| Work Output | The work done by the machine. |
| Efficiency | The comparison of work output to work input. |
| Mechanical Advantage | The number of times a machine multiplies the effort force. |
| Inclined Plane | An example is a ramp. |
| Wedge | an inclined plane that moves. |
| Screw | An inclined plane wrapped around a central bar. |
| Lever | a rigid bar that is free to pivot, or move about a fixed point. |
| Fulcrum | The fixed or pivotal point on a lever. |
| Pulley | a rope, belt, or chain wrapped around a grooved wheel. |
| Wheel and Axle | Simple machine made up of two circular objects. |
| Compound Machine | A combination made up of two or more simple machines. |
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