work, energy, and power – Flashcards
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inclined plane
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a simple machine that is a straight, slanted surface
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work
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the use of force to move an object some distance in the direction of the foce.
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energy
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the ability to do work.
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power
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the rate at which work is done.
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kinetic energy
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the energy of motion.
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potential energy
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the energy an object has because of its postion, conditions, or chemical composition.
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mechanical energy
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the energy possessed by an object due to its motion and position.
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machine
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any device that helps people do work by changing the way work is done.
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mechancial advantage
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the number of times the mechine multiplies the input force.
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mechanical effciency
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a comparison of a machine's work output with the work input.
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lever
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a simple machine that has a bar that pivots at a fixed point.
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fulcrum
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the fixed point.
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wheel and axle
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a simple machine that is made of a wheel connected to a smaller cylindrical object, the axle
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pulley
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a simple machine that has a grooved wheel that holds a rope or a cable.
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inclined plane
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a simple machine that is a starght, slanted surface.
