asp 4-B MECHANICAL ENERGY
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| Conservation of energy | The principle that the amount of energy iin any system remains the same, even if the form of the energy changes
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| Conservation of matter | The principle that the amount of matter in any system remains the same, even though it may have gone through physical or chemical change
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| Elastic potential energy | Potential energy that is created by tension in an object such as a stretch rubber band
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| Energy | The ability to do work
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| Gravitational potential energy | Potential energy due to an object's position relative to Earth or some other gravitational field
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| Joule (J) | The unit of energy or work
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| Kinetic energy | Energy of a body in motion; (1/2mv2)
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| Mechanical advantage | The ratio of output force to input force for a simple machine (resistance force/effort force or effort distance/resistance distance)
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| Potential energy | Stored energy because of its position or tension (mgh)
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| Simple machine | Any of the devices that work with one movement; includes the lever, wheel and axle, pulley, inclined plane, wedge, and screw
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| Work | The transfer of energy, measured as the product of the force applied to an object and the distance moved by that object in the direction of the force applied; equal to force x distance (f x d)
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| Power | The rate at which work is done (W/t)
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| Efficiency | The amount of work output divided by the work input expressed as a percentage
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| Effort distance | The distance an input force moves in a simple machine
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| Resistance distance | The distance the output force moves the resistance
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| Watt (or kilowatt) | The unit for power
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