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Thread: Perpetual motion machine

  1. #1 Perpetual motion machine 
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    Ok, so there's no such thing, but what would keep this from working? I'm too tired to play with it in my head.

    Say you had a mechanism roughly analogous to the form and design of a swingset.

    Where the swing was, would be an electromagnet. Directly underneath, where a persons feet would rest on the ground, would be another electromagnet. The chains could be linked to the center bar with magnetic bearings, to minimize friction. A coil would be on the sides/surround of the swinging electromagnet.

    You push the 'swing' to start it, and in the primary up and down-swing, what little current produced is then routed to the electromagnets. When the swing reaches bottom, a switch is thrown ending pull, letting the swing travel upward, hopefully a little farther, since there was attraction on the down-swing. This repeats until the swing reaches full revolution, and perpetual motion.

    Does it have to do with magnetic resistance to the generation of electricity?

    Like I say, I'm too tired and not knowledgeable enough to figure out why this wouldn't work, although I have a general sense. Thanks.


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  3. #2  
    Forum Junior Vroomfondel's Avatar
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    There will ALWAYS be energy lost in the wiring. If you use supercooled magnets with no resistence, then it will always take a lot of energy to keep wires cool, as the coolness will tend to dissipate. Remember the laws of thermodynamics: 0.You have to play the game; 1.You can win; 2.You cant break even; 3.You can quit.


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  4. #3  
    Forum Professor Zwolver's Avatar
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    :? what if it is used to store kinetic energy (now lakes are used to store potential energy)

    would it be a plus? (compared to the lake)
    Growing up, i marveled at star-trek's science, and ignored the perfect society. Now, i try to ignore their science, and marvel at the society.

    Imagine, being able to create matter out of thin air, and not coming up with using drones for boarding hostile ships. Or using drones to defend your own ship. Heck, using drones to block energy attacks, counterattack or for surveillance. Unless, of course, they are nano-machines in your blood, which is a billion times more complex..
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  5. #4  
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    There's also the logical impossibility of making a perpetual motion machine. The very components the machine is made out of would deteriorate over time. The chains you describe would succumb to rust from moisture in the atmosphere and if the machine were left on Earth then it would eventually be engulfed by our sun.

    No material substance will last forever at least in the exact same state at which it started.
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  6. #5  
    Forum Isotope Zelos's Avatar
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    yepp, and also energy would come from nowhere wich it cant
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  7. #6  
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    yeah, the heat would slow it down.

    Also, because of heat, it would last a long time running, but eventually come to a complete stop, like the clicking balls. You push on one ball, it hits the others and makes the other side click and back and forth. Eventaully it would stop due to gravity and friction and heat. The only place it would work is in a blackhole.
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