Many types of "perpetual motion machines" have been invented; however, none of them have ever worked. An example of a simple perpetual motion machine might be as follows: a battery is hooked up to an electrical engine, causing the engine to turn a generator, which recharges the battery. In theory, the machine could be turned on, and it would run forever; however, in reality, it will not. Why?

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    Energy is being destroyed as it moves through the generator; thus, the battery will eventually run out of energy.
    Eventually, the generator would wear out.
    A battery can hold a charge for only so long.
    Some of the energy will be lost in all of the energy transformations; thus, the battery will eventually run down.
asked May 30, 2013 in Biology by anonymous
    

1 Answer

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Some of the energy will be lost in all of the energy transformations; thus, the battery will eventually run down.
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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