Are perpetual motion machines possible?

A wheel that spins forever; a bird that never quenches its thirst; a clock that never stops ticking, an endless source of free energy. These are but the dreams of inventors striving to make perpetual motion machines, machines that can work forever without any energy input. Are these machines possible without violating the laws of physics? No.

How to shrink a quarter with electricity!
5 SCARY Physics Experiments!

Writer: Sophia Chen
Editors: Jabril Ashe and Dianna Cowern
Host: Dianna Cowern

Weather footage: NASA Goddard

Zimara’s Windmill drawing: Burton Lee Potterveld

Cox’s Timepiece drawing - Mr. Cox’s Perpetual Motion, a Prize in the Museum Lottery, single sheet, 225mm. x 174mm., full-page engraving with letterpress on verso, London, 1774. (Ex) Item 4848706

Music: APM and YouTube

Perpetual Motion Machines
Impossible Machines

[davej]

Are perpetual motion machines possible? No. Do I know why? Yes. Do I still want Physics Girl to explain it to me? YES

[donasgard]

PERPETUAL MOTION : i am going to make infinite amount of engergy.
FRICTION : I am going to end this man's whole career

[SandyRiverBlue]

Perpetual motion machines are a really great exercise in engineering efficiencies. The modern attempts at building these machines are amazingly efficient, just not perpetual.

[josea.]

"Lisa, in this house we obey the laws of thermodynamics!" - Homer Simpson.

[joenodden]

I saw a toy called the asteroid pendulum a "perpetual motion machine" but then came to a quick conclusion that it wasnt real because there was a battery pack on the bottom...

[johncochran]

Laws of thermodynamics
1. You can't win.
2. You can't break even unless it's a really cold day.
3. It can't get that cold.

[ZerofeverOfficial]

Cats always land on their feet. Bread always lands butter side down. Attach bread to cats back butter side up. Attach Cat/Bread combo to generator. Boom, infinite energy.

[Throefly]

The hardest part about building a perpetual motion machine is finding where to hide the battery.

[Jossandoval]

The three Laws of thermodynamic:
1.- You cannot win. For any energy invested in a system, you can't obtain more than its equivalent in work and heath in a given system.
2.- You cannot tie. In any given system, the hotter parts cannot maintain their temperature and will invariably get colder, until the total temperature averages.
3.- You cannot stop playing. No matter the system, the minimum temperature is absolute zero. If our universe can be considered a closed system, the far, far, future is a cold and lonely place.

[kentharris]

I'm building a Perpetual Motion machine on my 3D printer. 12 volt battery and motor required!

[CeriusDeluge]

I have been working on a perpetual motion machine since 6th grade. Oddly enough I can't seem to stop.

[LouisBertrandTech]

"It's all very simple, and so are you if you think it'll work." -- Rube Goldberg
I never knew that he was a real person. Brilliant!

[kallo]

We in Germany have already the unlimited Energy Machine.  Its made from a Cat, and one slice Toast Brot.  Since Cats ALWAYS land on the Legs. And Toast Brot ALWAYS land on the Butter side...  when both fall down, you only Need to put the Toast Brot on the Back of the Cat and let them both fall down.  It will spin neverendless, since the Cat will land on the Legs, and the Brot will land on the Butter side.  And since this Construction will spin neverless you have unlimited Energy.  We use this Machine in our House. You only Need to feed the Cat from day to day. Thats it.

[Dumbrarere]

Homer: "Lisa, get in here!"

Lisa: "Yes, dad?"

Homer: "In this house we obey the laws of THERMODYNAMICS!"

[jugulator]

Every Gym in the planet should be connected to the electricity grid...You get paid to workout on par with your energy output...Any merit to this?

[aimanjamil]

The only thing that really perpetual is our thoughts looking for perpetual machines.

[the.reel.mccoy.]

To be entirely honest, if the machine is converting an essentially infinite form of ambient energy from one form into kinetic energy, which arguably, is the most usable form of energy, then it deserves to be considered semi-perpetual motion in my book :)

[chessmaster]

This is why we need Professor Farnsworth.

[mattekanalenHz]

You're wrong, my mom told me that if i just believe enough, anything is possible

[Durzo]

Even though I know it's impossible, every time perpetual motion is mentioned, my imagination can't stop from trying to figure out how to do it.