Jun 10, 2013

Why are Perpetual Motion Machines considered impossible?

Why haven't the 1st & 2nd Laws of Thermodynamics been broken, enabling 'Perpetual Motion' & 'Free Energy'?
  • The first law of thermodynamics, which mandates conservation of energy, and states in particular that the flow of heat is a form of energy transfer.
  • The second law of thermodynamics, which states that the entropy of an isolated macroscopic system never decreases, or (equivalently) that perpetual motion machines are impossible.

Perpetual Motion describes hypothetical machines that operate or produce useful work indefinitely and, more generally, hypothetical machines that produce more work or energy than they consume, whether they might operate indefinitely or not.

There is undisputed scientific consensus that perpetual motion would violate either the first law of thermodynamics, the second law of thermodynamics, or both. Machines which comply with both laws of thermodynamics but access energy from obscure sources are sometimes referred to as perpetual motion machines, although they do not meet the standard criteria for the name.

Despite the fact that successful perpetual motion devices are physically impossible in terms of our current understanding of the laws of physics, the pursuit of perpetual motion remains popular.
The pursuit of 'Perpetual Motion Machines' dates back to the Middle Ages. For millennia, it was not clear whether perpetual motion devices were possible or not, but the development of modern thermodynamics has indicated that they are impossible. Despite this, many attempts have been made to construct a perpetual motion machine. Modern designers and proponents often use other terms, such as over unity, to describe their inventions.
Example of a Magnet Motor:


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