Why are there no perpetual motion machines?

Question

Is there no research close to resolving this problem. I recall that the late Professor Eric Laithwaite was working with gyro motion and had demonstrated a prototype. He was the big mover on maglev in the early days.

Answer 1

Friction

Answer 2

There are no perpectual motion machines because of 2nd law of thermodynamics, which states that entropy (or disorder) always increases in any physical system. This means that any machine you create will always leak out energy as excess heat. And whenever energy within a system leaks out, you will need to put the some more energy back in (i.e. addition fuel).



The reference you made regarding maglev or magnetic levitation suffers from this problem just like any other types of mechanical device man has created before. Even if we were able to use room temperature superconductors to generate the magnetic fields, there is no garanteed that you won't need to add additional energy into the device at some point (even if it is millions of years later, but I doubt we need to wait anywherre close to that long).

Answer 3

Perpetual motion machines violate one or both of the following two laws of physics: the first law of thermodynamics and the second law of thermodynamics. The first law of thermodynamics is essentially a statement of conservation of energy. The second law has several statements, the most intuitive of which is that heat flows spontaneously from hotter to colder places; the most well known is that entropy always increases, or at the least stays the same; another statement is that no heat engine (an engine which produces work while moving heat between two places) can be more efficient than a Carnot heat engine. As a special case of this, any machine operating in a closed cycle cannot only transform thermal energy to work in a region of constant temperature.



Machines which claim not to violate either of the two laws of thermodynamics but rather claim to generate energy from unconventional sources are sometimes referred to as perpetual motion machines, although they do not meet the standard criteria for the name. By way of example, it is quite possible to design a clock or other low-power machine to run on the differences in barometric pressure or temperature between night and day. Such a machine has a source of energy, albeit one from which it is quite impractical to produce power in quantity.

Answer 4

Perpetual motion machines are physically impossible.



There will always be energy lost in some way, no matter how small, which means that perpetual motion is an impossibility.



"Specifically, perpetual motion machines would violate either the first or second laws of thermodynamics."

Answer 5

In order for a perpetual motion machine to exist it must perpetually move. In order to do that it must have a perpetual energy source. Do to the fact that there is no perpetual energy source what would feed the motion in in such a machine? All known forms of energy eventually move from one form to another and dissipates over time even if it takes billions of years.

Answer 6

The reason that there are no perpetual motion machines is that it is not possible for a machine to generate energy without some input of energy (or mass in the case of a nuclear machine). You can't get something from nothing!

Answer 7

Newton's III law: Energy can neither be created or destroyed; it can only be changed from one form to the other.



This is true of all machines. Perpetual motion is impossible. Some energy is expended to another form (heat due to friction, as one example) no matter what you can do.



Magnetic levitation is - again a form of movement - takes electrical energy though. Tres Vitesse is based on this principle. But does not qualify as a perp.mov machine.

Answer 8

Check out:

Eric's History of Perpetual Motion and Free Energy Machines

http://www.phact.org/e/dennis4.html



This site describes why there aren't any perpetual motion machines:

http://burtleburtle.net/bob/physics/whythere.html

Answer 9

i imagine you ought to properly be at a loss for words as to what the critics extremely mean at the same time as they say perpetual action. i can plug a motor right into a wall socket and, given no positioned on and tear, the motor will run continuously. What a perpetual action gadget ability is that no outdoors ability is proficient into the equipment, or if there is, there's a internet output of ability from the equipment that equals the enter. Even those nifty little floaty magnetic tops that pick the flow ultimately supply up turning because of friction from the air. you ought to perhaps positioned the magnetic proper in a vacuum, yet even in an business "vacuum" there are nevertheless sufficient molecules of gas to have interplay with and ultimately supply up the gadget. And with the aid of ways, those critics for whom no staute has ever been equipped? one among them become Einstein. There are some statues of him, extremely.

Answer 10

The solar system seems to be the only perpetual motion machine that we can observe directly. The motion of the Earth and the planets requires no input of energy because friction is negligible.

Answer 11

Without actually applying force to make something move I'm not sure how it would move otherwise, and if the energy is used then it has to be expendable and would slowly be used up. I think this is like having the word ''infinity'' or ''eternal'' as nothing is! so perpetuality can only be achieved in mathematics.

Answer 12

Perpetual motion machines would violate either the first or second laws of thermodynamics. Unless of course, you could create on that operated at absolute zero.

Answer 13

if there were a perpetual motin machine then the energy crisi would be averted for a machine to attain perpetual motion then surely the oil producing extortion nations of this world would pay very highly fo it to be destroyed or kept quiet!!!

Answer 14

Entropy

Answer 15

because pepetual motion don't exist,, even the universe will wind down eventually.

Friction and gravity have stopped all attempts I have heard of.

Answer 16

Nothing lasts forever!

Answer 17

There are if you take them into space