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Gravity Machine Possible?

  1. Feb 3, 2004 #1
    Can one harness gravity mechanically? meaning, in a frictionless universe, can we have an object undergo the forces of gravity, extract energy via a generator (ex. mass falling onto a spring which generates electricity), and reciprocate this while also producing excess energy? Is this possible, impossible, or still in debate?
     
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  3. Feb 3, 2004 #2

    chroot

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    No, not even in a frictionless universe. Gravity is a conservative force.

    - Warren
     
  4. Feb 4, 2004 #3
    can you please explain this a little more, i am not very smart...
     
  5. Feb 4, 2004 #4

    chroot

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  6. Feb 4, 2004 #5
    Lol a rather simple solution, not exactly what i was looking for, i was taking situation exemplified in hyperphysics with an additional force of gravity in only one direction... can we neutralize gravity for one path?
     
  7. Feb 4, 2004 #6

    selfAdjoint

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  8. Feb 4, 2004 #7
    you can with a magnetic field...
     
  9. Feb 4, 2004 #8
    How about hydroelectric power from a waterfall ;)
     
  10. Feb 5, 2004 #9

    FZ+

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    Hydroelectric power is really just indirectly harnessing energy from solar radiation - having it evaporate water, lift it, and then letting it fall under gravity.
     
  11. Feb 5, 2004 #10

    chroot

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    And no, Mattius_, you cannot build a free-energy machine with magnets either.

    - Warren
     
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