Has there ever been a working perpetual-motion machine?

Question

Has there ever been a working perpetual-motion machine?

Answer 1

No, it would violate the laws of thermodynamics.

Answer 2

No.



Though, in theroy it should be possible to create a machine that is self sufficient and does not require external energy, in practice various mechanical or electrical losses (such as friction) make it impossible.

Due to these losses, efficieny of the machine becomes less than 100% (some energy is lost as inefficiencies such as heat), so if there was no external energy supplied, the machine will stop workinng in finite amount of time.

Answer 3

No - such machines violate the fact that energy is consumed every time it is converted from one form to another; from mechanical to electrical is one example. Manifestations of the lost energy are heat, noise, etc. PM machines would provide free energy. Anti-gravity machines also would provide free energy and free power and are likewise impossible. There ain't no free energy.

Answer 4

No. Not even nature is perpetual- it needs the sun which is running out.

Answer 5

NO not poss