IN SIMPLE WORDS: Friction turns mechanical energy into heat energy which causes a loss in mechanical energy and loss in possibility to continue motion..
When there is friction - as is usually the case - motion will eventually stop.
Neither first or second kind of perpetual motion machines can be constructed, beacuse their existence violates the first law of Thermodynamics
Losses due to friction mean that in a closed system there is never 100% transfer of energy and therefore no such thing as Perpetual Motion machines (although some get close).
No one, and no one ever will, since perpetual motion machines are a scientific impossibility.
Theoretically it is impossible. Many have tried and many continue to attempt to develop a perpetual motion machine. Only if there is no friction and no energy is lost to the surroundings, would perpetual motion be possible... No. Such machines are not possible, although until the end of mankind people will perpetually try to imagine or create one.
When there is friction - as is usually the case - motion will eventually stop.
Perpetual motion machines are an impossibility. Energy conversion is never 100% efficient. Even if it were, friction is never zero.
Lots of people who don't understand thermodynamics very well. (Perpetual motion machines are not possible.)
Neither first or second kind of perpetual motion machines can be constructed, beacuse their existence violates the first law of Thermodynamics
Perpetual motion machines are theoretical only. No one has actually invented one. A perpetual motion machine would have to be able to provide its own source of energy to continue operating.
Losses due to friction mean that in a closed system there is never 100% transfer of energy and therefore no such thing as Perpetual Motion machines (although some get close).
No one, and no one ever will, since perpetual motion machines are a scientific impossibility.
Perpetual motion is impossible if there is any friction, or any other removal of linerar or angular momentum.
Theoretically it is impossible. Many have tried and many continue to attempt to develop a perpetual motion machine. Only if there is no friction and no energy is lost to the surroundings, would perpetual motion be possible... No. Such machines are not possible, although until the end of mankind people will perpetually try to imagine or create one.
Perpetual motion machines have, to date, always been a disappointment.
No, perpetual motion is prohibited by the laws of thermodynamics.There are machines that might at first seem to be perpetual motion machines but only because their source of energy may not be readily apparent.add. But in economics, inflation serves the purpose of a perpetual motion machine, in which more currency is created continuously. And which serves to illustrate the reality of economics.
Perpetual motion. This answer is more related to the question "What do all machines DO NOT HAVE.