| Term | Definition |
|---|
| joule | a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second |
| potential energy | the mechanical energy that a body has by virtue of its position |
| mechanical energy | the combination of all the kinetic and potential energy that something has |
| law of conservation of energy | the law that states that energy cannot be created or destroyed but can be changed from one form to another |
| work | the transfer of energy that occurs when a force makes an object move |
| power | (physics) the rate of doing work |
| machine | a device that makes work easier |
| mechanical advantage | the ratio of output force to input force for a machine |
| efficiency | the ratio of the output to the input of any system |
| simple machine | a machine that does work with only one movement |
| lever | a bar that is free to pivot or turn around a fixed point |
| pulley | a simple machine that consists of a rope that fits into a groove in a wheel |
| wheel and axle | simple machine made from two circular objects of different diameters that are attached and rotate together |
| incline plane | a sloping surface, such as a ramp, that reduces the amount of force required to do work |
| screw | an inclined plane wrapped around a cylinder |
| wedge | inclined plane with one or two sloping sides that moves through an object |
| kenetic energy | Energy of Motion |
| compound machine | a machine made of more than one simple machine |
Combine with other sets
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