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Perpetual motion

Why is perpetual motion impossible on earth?

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Perpetual motion on earth is impossible because of friction.
<br>The concept breaks the basic laws of thermodynamics. Many designs have been purported to do this but all have proved bogus.
<br>The kicker comes from the second law of thermodynamics which states:
<br>'In all energy ...

Solution Summary

Perpetual motion is explained in layman's terms.