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The animation illustrates a "perpetuum motion machine" which
implements a nonconservative Force field. A wooden ball falls to
the right and rises in the water to the left. Walves take care that
the water is kept in place. You can assume that friction is neglectible
and that operating the walves does not take energy.
The first law of thermodynamics assures that "perpetuum mobiles" can
not exist. Until now, no violation of the first law of thermodynamics
was observed (except on a microscopic quantum level, where energy and
time obey a uncertainty principle). So, whats wrong with the
perpetuum motion machine displayed here?
A handout on perpetuum motion
machines.
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