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Thread: About Repulsive Force

  1. #1 About Repulsive Force 
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    Hi everyone!

    I would like to ask some questions about Repulsive Force to understand it better.

    1. Does it affects or being affected by gravity?

    2. If there is a core which emanate repulsive force, for example a planet, would the planet disintegrate because it repulse its own matter or the planet itself remains intact, but all other objects are pushed away?

    3. Still taking a planet as a hypothetical example, how the atmosphere is influenced? Would it be as it is now or it would not even exists?

    4. Would it be possible having a planet like ours, but having a repulsive force field in the exosphere so everything inside the atmosphere is affected by a normal gravity force, but everything beyond is repulsed?

    Thank you and hope to read your answers soon!


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  3. #2 Re: About Repulsive Force 
    Reptile Dysfunction drowsy turtle's Avatar
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    Quote Originally Posted by kadombing
    1. Does it affects or being affected by gravity?
    I'm not sure exactly what you mean, but there is no repulsive force in gravitation (or not yet!).

    Quote Originally Posted by kadombing
    2. If there is a core which emanate repulsive force, for example a planet, would the planet disintegrate because it repulse its own matter or the planet itself remains intact, but all other objects are pushed away?
    When objects are repelled, both objects lose potential energy, so essentially yes, repelling another object causes both to lose mass.

    Quote Originally Posted by kadombing
    3. Still taking a planet as a hypothetical example, how the atmosphere is influenced? Would it be as it is now or it would not even exists?
    None of the molecules would be lost or destroyed, and since we're talking about repulsive forces, only charged particles would be affected. Again, they wouldn't be lost or damaged, they would simply lose weight.

    Quote Originally Posted by kadombing
    4. Would it be possible having a planet like ours, but having a repulsive force field in the exosphere so everything inside the atmosphere is affected by a normal gravity force, but everything beyond is repulsed?
    No.


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  4. #3 Re: About Repulsive Force 
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    First of all, thank you for your answers!

    Quote Originally Posted by drowsy turtle
    Quote Originally Posted by kadombing
    1. Does it affects or being affected by gravity?
    I'm not sure exactly what you mean, but there is no repulsive force in gravitation (or not yet!).
    Yes, sorry I forgot to specify.
    For example, like the repulsive force presents in a magnet, is it being affected by gravity in some way?

    Or probably a better formulation of the question: Does gravity affects magnetic fields and/or vice versa?


    Quote Originally Posted by drowsy turtle
    Quote Originally Posted by kadombing
    2. If there is a core which emanate repulsive force, for example a planet, would the planet disintegrate because it repulse its own matter or the planet itself remains intact, but all other objects are pushed away?
    When objects are repelled, both objects lose potential energy, so essentially yes, repelling another object causes both to lose mass.
    Which one would happen then?

    1. The planet would disintegrate because it repulse its own matter (so it would not even exist as a planet)
    2. The planet itself remains intact, but all other objects are pushed away

    Because I read there is these "self-adhesion" that keeps matter being disperse from a planet due its rotating and revolving motion.


    Quote Originally Posted by drowsy turtle
    Quote Originally Posted by kadombing
    3. Still taking a planet as a hypothetical example, how the atmosphere is influenced? Would it be as it is now or it would not even exists?
    None of the molecules would be lost or destroyed, and since we're talking about repulsive forces, only charged particles would be affected. Again, they wouldn't be lost or damaged, they would simply lose weight.
    But in case of a planet, without (enough) gravity force, would the atmosphere exists? Would not the molecules just disperse in space?

    Sorry but I lack of understanding skill as you might notice.

    I have more questions, but at least these are not hypothetical:

    5. If the Sun's gravity and the planet's centrifugal motion keep them in their orbit, what keeps them in their distance from the sun as we know it?
    Like:

    Mercury - Venus - Earth - Mars - Jupiter - Saturn - etc.

    The size of the planets seems not an influence. Why we do not have planets in order of their size, like the biggest are further from the Sun and the smaller the planet they get further? What is the responsible agent for this disposition?

    Thank you.
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  5. #4 Re: About Repulsive Force 
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    Quote Originally Posted by kadombing
    Hi everyone!

    I would like to ask some questions about Repulsive Force to understand it better.

    1. Does it affects or being affected by gravity?
    Gravitation and repulsive forces such as electrostatic or magnetic, are independent. Both forces may affect the same objects, in which case the net force will be the sum of the gravitational force and the repulsive force.
    2. If there is a core which emanate repulsive force, for example a planet, would the planet disintegrate because it repulse its own matter or the planet itself remains intact, but all other objects are pushed away?
    There is no anti-gravity. If you want to imagine that there is anti-gravity, you are free to make up your own laws of physics. Then you could imagine that the planet explodes or not, whatever you like.

    5. If the Sun's gravity and the planet's centrifugal motion keep them in their orbit, what keeps them in their distance from the sun as we know it?
    Like:

    Mercury - Venus - Earth - Mars - Jupiter - Saturn - etc.

    The size of the planets seems not an influence. Why we do not have planets in order of their size, like the biggest are further from the Sun and the smaller the planet they get further? What is the responsible agent for this disposition?
    It is simply Newton's laws of motion. Recall Galileo's famous experiment where he dropped objects of different mass from the Tower of Pisa. They experienced the same acceleration, regardless of their mass.
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  6. #5 Re: About Repulsive Force 
    Forum Freshman icarus2's Avatar
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    Quote Originally Posted by kadombing
    Hi everyone!
    I would like to ask some questions about Repulsive Force to understand it better.

    1. Does it affects or being affected by gravity?

    2. If there is a core which emanate repulsive force, for example a planet, would the planet disintegrate because it repulse its own matter or the planet itself remains intact, but all other objects are pushed away?

    3. Still taking a planet as a hypothetical example, how the atmosphere is influenced? Would it be as it is now or it would not even exists?

    4. Would it be possible having a planet like ours, but having a repulsive force field in the exosphere so everything inside the atmosphere is affected by a normal gravity force, but everything beyond is repulsed?
    Hello, kadombing
    For the Repulsive gravity(antigravity), view to the below link!

    http://www.thescienceforum.com/Simul...ter-25396t.php

    Simulation video of the negative mass, dark matter, dark energy, antigravity -1
    http://www.youtube.com/watch?v=jlDl9w8ariI
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  7. #6 Re: About Repulsive Force 
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    Quote Originally Posted by Harold14370
    Quote Originally Posted by kadombing
    Hi everyone!

    I would like to ask some questions about Repulsive Force to understand it better.

    1. Does it affects or being affected by gravity?
    Gravitation and repulsive forces such as electrostatic or magnetic, are independent. Both forces may affect the same objects, in which case the net force will be the sum of the gravitational force and the repulsive force.
    2. If there is a core which emanate repulsive force, for example a planet, would the planet disintegrate because it repulse its own matter or the planet itself remains intact, but all other objects are pushed away?
    There is no anti-gravity. If you want to imagine that there is anti-gravity, you are free to make up your own laws of physics. Then you could imagine that the planet explodes or not, whatever you like.

    5. If the Sun's gravity and the planet's centrifugal motion keep them in their orbit, what keeps them in their distance from the sun as we know it?
    Like:

    Mercury - Venus - Earth - Mars - Jupiter - Saturn - etc.

    The size of the planets seems not an influence. Why we do not have planets in order of their size, like the biggest are further from the Sun and the smaller the planet they get further? What is the responsible agent for this disposition?
    It is simply Newton's laws of motion. Recall Galileo's famous experiment where he dropped objects of different mass from the Tower of Pisa. They experienced the same acceleration, regardless of their mass.
    Quote Originally Posted by icarus2
    Quote Originally Posted by kadombing
    Hi everyone!
    I would like to ask some questions about Repulsive Force to understand it better.

    1. Does it affects or being affected by gravity?

    2. If there is a core which emanate repulsive force, for example a planet, would the planet disintegrate because it repulse its own matter or the planet itself remains intact, but all other objects are pushed away?

    3. Still taking a planet as a hypothetical example, how the atmosphere is influenced? Would it be as it is now or it would not even exists?

    4. Would it be possible having a planet like ours, but having a repulsive force field in the exosphere so everything inside the atmosphere is affected by a normal gravity force, but everything beyond is repulsed?
    Hello, kadombing
    For the Repulsive gravity(antigravity), view to the below link!

    http://www.thescienceforum.com/Simul...ter-25396t.php

    Simulation video of the negative mass, dark matter, dark energy, antigravity -1
    http://www.youtube.com/watch?v=jlDl9w8ariI
    Thank you for the answer.

    Well, I am not aware that I was entering anti gravity area, because I was simply referring to repulsive force present in the electrostatic or magnetic phenomena.

    That is it, I have got my answers!

    By the way, while searching for answer to these question yesterday I came to this article of a curious happening:

    "Invisible Electrostatic Wall" at 3M adhesive tape plant

    SESSION 7: SPECIAL SESSION, 17th Annual EOS/ESD Symposium
    THURSDAY, SEPTEMBER 14, 1995, 8:00 am

    SESSION 7: SPECIAL SESSION: ELECTROSTATIC CONSIDERATIONS IN INDUSTRY
    MODERATOR: D. Swenson, 3M

    7.7 CASE STUDY - LARGE PLASTIC WEB ELECTROSTATIC PROBLEMS, RESULTS AND
    CURE, D. Swenson, 3M Company

    Tremendous static charge generation on a plastic web causes unique
    physical phenomena and special problems. Solution was simple and cost
    effective.

    Also see: article in the ESD Journal

    David Swenson of 3M Corporation describes an anomaly where workers encountered a strange "invisible wall"
    in the area under a fast-moving sheet of electrically charged polypropelene film in a factory. This "invisible
    wall" was strong enough to prevent humans from passing through. A person near this "wall" was unable to
    turn, and so had to walk backwards to retreat from it.
    This occurred in late summer in South Carolina, in extremely high humidity. Polypropelene (PP) film on 50K
    ft. rolls 20ft wide was being slit and transferred to multiple smaller spools. The film was taken off the main roll
    at high speed, flowed upwards 20ft to overhead rollers, passed horizontally 20ft and then downwards to the
    slitting device, where it was spooled onto shorter rolls. The whole operation formed a cubical shaped tent, with
    two walls and a ceiling approximately 20ft square. The spools ran at 1000ft/min, or about 10MPH. The PP
    film had been manufactured with dissimilar surface structure on opposing faces. Contact electrification can
    occur even in similar materials if the surface textures or micro-structures are significantly different. The
    generation of a large imbalance of electrical surface-charge during unspooling was therefor not unexpected, and
    is a common problem in this industry. "Static cling" in the megavolt range!
    On entering the factory floor and far from the equipment, Mr. Swenson's 200KV/ft handheld electrometer was
    found to slam to full scale. When he attempted to walk through the corridor formed by the moving film, he
    was stopped about half way through by an "invisible wall." He could lean all his weight forward but was unable
    to pass. He observed a fly get pulled into the charged, moving plastic, and speculates that the e-fields might
    have been strong enough to suck in birds!
    The production manager did not believe Mr. Swenson's report of the strange phenomena. When they both
    returned to the factory floor, they found that the "wall" was no longer there. But the production workers had
    noticed the effect as occurring early in the morning when humidity was lower, so they agreed to try again
    another day. The second attempt was successful, and early in the morning the field underneath the "tent" was
    strong enough to raise even the short, curly hair of the production manager. The "invisible wall" effect had
    returned. He commented that he "didn't know whether to fix it or sell tickets."
    - Bill Beaty

    Problems: coulomb forces would be expected to *attract* a person into the "chamber" formed by
    the PP film, and the attractive force should be fairly linear across distance. There should be no
    "wall" in the center, a "wall" is repulsive and nonlinear.
    If for some reason a person was repelled from the center of the chamber rather than being
    attracted, there still should be no "wall," since the repulsion force should exist over a large distance;
    it should act like a deep pillow which exerts more and more force as one moves deeper into it. It
    should not behave like a "wall". This is how magnets and iron behave, and this is how e-fields and
    conductive objects should also behave.
    A thought: unspooling of film typically generates higher net charge on the long piece of film than on
    the limited surface of the spool. However, since net charge is conserved, imbalances of charge
    MUST be equal and opposite. The charge on the entire length of moving film MUST be equal in
    magnitude to the charge on the spool, yet the charge on the film is very large and is continuously
    increasing. The limited surface-charge on the spool indicates that opposite charge is being lost
    through some unseen path, most probably as IONIZED AIR.
    Charged air would arise in the cleft between film and spool as the film was peeled from the spool. I
    wonder if film was peeled from the top of the spool, so that any ionized air would be launched into
    the "tent-chamber" region? If it was peeled from the bottom of the spool, the charged air would end
    up outside the "tent." Or, if a corona discharge arises in the cleft between film and spool, perhaps
    the UV and e-fields of this corona can ionize the air on both sides of the exiting plastic film, and
    spray the charged air everywhere.
    So, if the charged "tent" of film is negative in the above situation, and if a large quantity of
    positively charged air is being generated at the spool, then perhaps the "invisible wall" is caused by a
    cloud of suspended air ions. Perhaps it is a pressure gradient created by ionized air trapped under
    the tent by electrostatic attraction. Yet this effect would be expected to create a diffuse zone of
    increasing force, not a "wall", but an "invisible pillow."
    However, a volume of charged air is somewhat analogous to iron filings near a magnet. If a solid
    sheet of iron filings is held in place by a magnet, then a literal "wall" is created, and this wall will
    resist penetration by nonferrous objects. If in the above manufacturing plant a sheet of highly
    charged air is for some reason being held in place by the fields created by the charged film, then a
    transparent "wall" made of charged air would come into being. It might resist penetration by human
    bodies.
    My question is this: if the entire situation could be turned on its side, so the "invisible wall" became
    an "invisible floor", could a person *stand* on it? Have we discovered the long-sought "Zero-G
    waterbed?" - B.B.
    Reference: Article about the "Wall" in ESD Journal (IT'S BACK! 8/2000)

    http://amasci.com/weird/unusual/e-wall.html
    Good life to everyone and remember that we are dying!

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