A perpetual motion machine of the first kind it what we usually mean by a perpetual motion machine. A device which once started will continue to run and do useful work forever without the need to add energy to keep it going. The laws of physics make such a device impossible.

Neither first or second kind of perpetual motion machines can be constructed, beacuse their existence violates the first law of Thermodynamics

Because perpetual motion can not happen

Perpetual Motion Machine - song - was created on 2009-07-17.

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