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  1. #1
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    Default Perpetual Motion Machine

    I recently saw an article on perpetual motion machines. I spoke to a work colleague about them, and although he is a futuristic type of guy who can make robotic things and is a wizz on 3D printers, he said it was not possible.

    The one I saw was based on ball bearings to give the energy for constant rotation.

    So are perpetual motion machines a myth or have one of you made one?

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  3. #2
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    Total myth. Even the universe will eventually end up room temperature.
    Steve
    Kilmore (Melbourne-ish)
    Australia

    ....catchy phrase here

  4. #3
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    I heard you could make a perpetual machine by strapping a piece of toast, with the butter side up, to the back of a cat.

  5. #4
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    The problem with perpetual motion is that every body in motion interacts with its environment causing loss of energy.

  6. #5
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    Perpetual motion is not possible as it would break at least one of the laws of thermodynamics. There are plenty of articles online explaining this in detail, google will find them for you.

  7. #6
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    If there was no friction between any moving parts of given perpetual motion machine once it was moving it should keep going, but friction is here to stay so nope, there are various means of reducing friction to very low values but it is still there.

    Pete

  8. #7
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    I like this topic, its fun to think about. The current understanding of how this universe works does not allow for a "perpetual motion" device as such.....

  9. #8
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    Quote Originally Posted by seriph1 View Post
    Total myth. Even the universe will eventually end up room temperature.
    The universe will end up waaaay colder than room temperature; it will approach (but never quite reach) absolute zero or about -273 degrees C

  10. #9
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    Quote Originally Posted by pjt View Post
    If there was no friction between any moving parts of given perpetual motion machine once it was moving it should keep going, but friction is here to stay so nope, there are various means of reducing friction to very low values but it is still there.

    Pete
    Even if you could do that, you still wouldn't be able to use it for any useful purpose because it would need to be producing more energy than it uses so that you can take some out and still leave it running.

  11. #10
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    Default Perpetual Motion Machine

    Elanjacobs that's the definition of room temperature

    But thanks for being so literal
    Steve
    Kilmore (Melbourne-ish)
    Australia

    ....catchy phrase here

  12. #11
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    Quote Originally Posted by seriph1 View Post
    Elanjacobs that's the definition of room temperature

    But thanks for being so literal
    If we're discussing science, we should stick to scientific definitions of things; room temperature is generally accepted as 20C

  13. #12
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    Quote Originally Posted by Lappa View Post
    I heard you could make a perpetual machine by strapping a piece of toast, with the butter side up, to the back of a cat.
    Not true, the cat is good for a few days but then it keels over from lack of water and food. The trick here is to cycle cats in and out of service for endless amounts of almost free energy.

  14. #13
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    I think I might be married to one, a perpetual motion machine I mean.
    mick

  15. #14
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    Quote Originally Posted by elanjacobs View Post
    The universe will end up waaaay colder than room temperature; it will approach (but never quite reach) absolute zero or about -273 degrees C
    Thats my shed during the winter. One just needs good socks

  16. #15
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    I haven't finalised the details yet, but imagine a vacuum jar like they had in science labs at school, with two magnets sort of levitating, and a spinning disc. No friction from air, no friction from items touching each other, just a minor problem in working out how to get the disc to spin. Maybe the disc would be one of the magnets?
    Oh, and it doesn't matter what the room temperature is!
    How much grey matter will be used up thinking about this contraption? Should keep someone awake for a while!

    Alan...

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