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It's not possible because it would violate one or both of the laws of thermodynamics.

The first law of thermodynamics says that you can't create energy from nothing, or to out it another way, you can't get more energy out of a machine than you put into it.

The second law says that no machine is 100% efficient. You must actually get less energy out of a machine than you put into it.

The laws of thermodynamics apply to the entire universe and all bodies within it, including alleged perpetual motion machines.

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Q: Why is a perpetual motion machine not possible?
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