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Thread: Can you cancel gravity?

  1. #1 Can you cancel gravity? 
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    Can you cancel out gravity?

    I'm obsessed with canceling out gravity.


    With bravery and recognition that we are harbingers of our destiny and with a paragon of virtue.
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  3. #2  
    Forum Radioactive Isotope MagiMaster's Avatar
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    Short answer: No.


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  4. #3  
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    Fenyman says: Yes, use a chair.
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  5. #4  
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    what if you matched gravity's pull
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  6. #5  
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    There is the possibility that the gravitational pull of the earth (for example) could be reduced to near zero, if the earth could be shrunk to 1mm in size.

    The formula for this is G(effective) = c^2/[c^2/G + m/r)

    This is totally impractical of course!, but is the only way possible.

    For galaxies the m/r ratio reaches c^2/G at the centre, the gravity almost disappears and the ejection of jets results.

    John H.
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  7. #6  
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    There is no known way to escape gravity.Its proportional to (atomic)mass.You can certainly counteract gravity,with an equal opposing gravitational force.That is quite common in fact.
    Last edited by brane wave; August 15th, 2011 at 07:19 PM. Reason: incomplete answer
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  8. #7  
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    It is possible, but currently humanity can't! Perhaps in the future...
    - The best way to predict the future is to invent it. Alan Kay.
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  9. #8  
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    Quote Originally Posted by john hunter View Post
    There is the possibility that the gravitational pull of the earth (for example) could be reduced to near zero, if the earth could be shrunk to 1mm in size.

    The formula for this is G(effective) = c^2/[c^2/G + m/r)

    This is totally impractical of course!, but is the only way possible.

    For galaxies the m/r ratio reaches c^2/G at the centre, the gravity almost disappears and the ejection of jets results.

    John H.
    This is wrong. Where do you get this from? Stellar Black Holes are compressed mass, and they do gravitate.

    0f36df929ac9d711a8ba8c5658c3bfee.png

    G is a universal constant, so the force depends on the masses and the distance between them. Mass is mass, you cannot get rid of it. The cause for the jet ejection has nothing to do with losing gravitational force.
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  10. #9  
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    Quote Originally Posted by Japith View Post
    Can you cancel out gravity?

    I'm obsessed with canceling out gravity.
    Gravity cancels gravity. Take two extremely large black holes of the same size close to each other. Stand exactly between them, in the dead center. There will be no gravity there.

    There's also no gravity at the center of the Earth.
    Some clocks are only right twice a day, but they are still right when they are right.
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  11. #10  
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    well get over your obsession- a quart of tequiella might help
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  12. #11  
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    Unless you mean counter gravity in the sense of having no net force pulling you down towards the surface of the earth. In that case, yes, of course it is possible.

    But otherwise... I mean, even your computer exerts a gravitational pull on you.
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  13. #12  
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    Quote Originally Posted by john hunter View Post
    There is the possibility that the gravitational pull of the earth (for example) could be reduced to near zero, if the earth could be shrunk to 1mm in size.

    The formula for this is G(effective) = c^2/[c^2/G + m/r)

    This is totally impractical of course!, but is the only way possible.



    For galaxies the m/r ratio reaches c^2/G at the centre, the gravity almost disappears and the ejection of jets results.

    John H.
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  14. #13  
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    Gravity is an inherent byproduct of the presence of matter. If there is no matter present then there is no need for anit-gravity, as there would be no purpose anyway.
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  15. #14  
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    Yes, see Lagrangian point where the net gravitation field cancels.
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  16. #15  
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    Gravity is anomalous in that it is asymmetrical, attracting only, vs electromagnetism which is uniformly bipolar- theoretically, magnetic monopoles may exist, though so far no such phenomena have been detected. Perhaps this is why so often those seeking to counteract force of gravity by exotic means turn to electromagnetism? There is likewise speculation as to the possibility of "negative matter" which behaves contrary to matter pedestrian, push on, it moves towards you, pull and it moves away. Couple chunk of negative matter to equivalent chunk positive matter, instant and very potent space drive. THIS IS NOT antimatter, but a different thing altogether.

    Late great physicist Dr. Robert L. Forward explored implications in novelized form, "Timemaster".
    The bravest are surely those who have the clearest vision of what is before them, glory and danger alike, and yet notwithstanding go out to meet it.- Thucydides
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  17. #16  
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    Quote Originally Posted by davidmac View Post
    Gravity is an inherent byproduct of the presence of matter. If there is no matter present then there is no need for anit-gravity, as there would be no purpose anyway.
    Property of matter or dents in space-time to which matter is drawn? Does such a distinction matter? Just saying we associate matter with gravitation, but as to whether one CAUSES the other, is impossible to tell to present level of Prince's understanding?
    The bravest are surely those who have the clearest vision of what is before them, glory and danger alike, and yet notwithstanding go out to meet it.- Thucydides
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  18. #17  
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    Antigravity is the negative gravity. So you need antigravity.
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  19. #18  
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    I've read some of R.L. Foreward's stuff, and Dragon's Egg is still one of my all time favourites.
    I wasn't aware that he'd passed away.
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  20. #19  
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    yesss i did it last night...
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  21. #20  
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    Quote Originally Posted by The Finger Prince View Post
    Gravity is anomalous in that it is asymmetrical, attracting only, vs electromagnetism which is uniformly bipolar- theoretically, magnetic monopoles may exist, though so far no such phenomena have been detected. Perhaps this is why so often those seeking to counteract force of gravity by exotic means turn to electromagnetism? There is likewise speculation as to the possibility of "negative matter" which behaves contrary to matter pedestrian, push on, it moves towards you, pull and it moves away. Couple chunk of negative matter to equivalent chunk positive matter, instant and very potent space drive. THIS IS NOT antimatter, but a different thing altogether.

    Late great physicist Dr. Robert L. Forward explored implications in novelized form, "Timemaster".
    Electromagnetism, in the form of an electromagnetic coil, is bipolar. However, consider the hydrogen atom, which consists of an electron and a proton. The charges cancel one another, and yet there is a force of gravity between them. The calculation of the electrostatic forces between all four charges of two atoms averages out to a force that exceed the force of gravity. This is in contradiction to the common claim that equal and opposite charges cancel one another. That would only happen when the electrons and protons are arranged in a particular array.
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  22. #21  
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    yea, it has already been done
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  23. #22  
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    Quote Originally Posted by myhouseinthewoods View Post
    yea, it has already been done
    Citation needed.

    Or, to put it another way: liar, liar, pants on fire!
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    ei incumbit probatio qui dicit, non qui negat
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    It's possible there is something we know absolutely nothing about (yet, or ever), but that's about as far as I can throw anti-gravity.
    It is by will alone I set my mind in motion.
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  25. #24  
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    Thanks to the miracle of the Internet I was able to find this old Calvin & Hobbes cartoon.

    Calvin and Hobbes Comic Strip, July 14, 2008 on GoComics.com
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  26. #25  
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    Lord knows, as you get older you truly WISH you could CANCEL gravity!
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  27. #26  
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    Cancelling gravity is slightly more difficult than convincing Readers' Digest that you do not want to take part in their prize draw: and that's scientifically impossible.
    "[Dywyddyr] makes a grumpy bastard like me seem like a happy go lucky scamp" - PhDemon
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  28. #27  
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    Quote Originally Posted by iantresman View Post
    Yes, see Lagrangian point where the net gravitation field cancels.
    You beat me to posting this. Very good.
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  29. #28  
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    Quote Originally Posted by xyzt View Post
    Quote Originally Posted by iantresman View Post
    Yes, see Lagrangian point where the net gravitation field cancels.
    You beat me to posting this. Very good.
    He beat you by two years in fact.
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  30. #29  
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    Quote Originally Posted by KALSTER View Post
    Quote Originally Posted by xyzt View Post
    Quote Originally Posted by iantresman View Post
    Yes, see Lagrangian point where the net gravitation field cancels.
    You beat me to posting this. Very good.
    He beat you by two years in fact.
    LOL, he sure did.
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