Why do physicists say that free energy is impossible?

If we lived in a world where we did not have gravity, magnets, the sun or wind (etc.) then I could see saying that a free energy device could not work. But with these FREE elements, why do we insist that it cannot be done? In other words, why is it that we accept solar power, but not gravity-powered, or... show more If we lived in a world where we did not have gravity, magnets, the sun or wind (etc.) then I could see saying that a free energy device could not work. But with these FREE elements, why do we insist that it cannot be done? In other words, why is it that we accept solar power, but not gravity-powered, or magnet-powered energy, that is perpetual? It does NOT breat the second law of Thermodyamics because it IS powered by an outside source -- namely the magnets or gravity. I'm convinced it can be done, and have even seen it done on small scale.

Any physicists want to comment?

Me
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