Where does the energy of gravity come from?

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SUMMARY

The discussion centers on the source of energy involved in gravitational interactions, particularly during a gravitational slingshot maneuver around the Moon. Participants assert that the energy gained by a spacecraft comes from the Moon's kinetic energy, as the Moon experiences a minuscule decrease in speed during the encounter. The conversation highlights that gravity is a static force that does not do work in a stable orbit, yet energy is transferred within the Earth-Moon system, leading to the Moon gradually moving away from Earth. The concept of energy conservation is emphasized, with the understanding that energy is neither created nor destroyed but transferred between celestial bodies.

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  • #61
DaveC426913 said:
No. No work is being done because the CoM of the (Earth/Moon) system has remained stationary.


Depends on whether you include the asteroid in the system or not. If you do not, then yes work is done (the CoM of Earth/Moon has moved due the external influence of the asteroid); if you do, tehn no work is done (because the CoM of Earth/Moon/asteroid has not moved).

Sorry if I have misinterpreted once more, but I understand you guys to be saying that energy is not used in a system if the sum of potential and kinetic energy is constant. Is this right?
 
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  • #62
Leonardo de N said:
It is my belief that gravity is what is experienced when the boson graviton flow is compressed as it flows in a concentric manor toward the center of a clumped mass. That this graviton flux is confined and channeled (maximized) in a hyperbolic-parabolic environment as it zooms in on the magnetic equator of the clumped rotating mass. Unlike a photon we don't see the graviton flow because it is flowing sidewise within the plane of the channeled flow. I've chosen to call this a "null zone".

So how is the energy from the graviton transferd? first into a meu messon (the only particle which is it's own anti-particle and which only occurs naturally in a null zone) and than into 2 electrons and 2 positrons plus both positive and negative photons. The transfer from boson energy to fermion mass involves a chiral twist which is the rotational source (angular momentum) that keeps the mass (say the earth) spinning.

Remembering that all gravitational effects are additive, the rotation will increase or decrease depending upon the strength of the graviton flux. The moon without an electro-magnitic field will neither add to or subtract from the Earth's graviton field.

I don't suppose that you feel like any kind of saaaaay... proof or citation or anything to support your 'belief'? I can hear the high energy folks tearing out clumps of hair as we speak, and I suspect the GR folks are sharpening their knives. I'm just here to lap up the blood. :smile:
 
  • #63
flufffrost said:
Sorry if I have misinterpreted once more, but I understand you guys to be saying that energy is not used in a system if the sum of potential and kinetic energy is constant. Is this right?

Energy is never "used". It's not like energy just disappears, it just gets transformed to a different form. This is the law of conservation of Energy.

It's like my money. If I give my money to you to buy a hamburger, my money doesn't just disappear, it gets transferred to you! So if you say "hey did you use up that money?", I might say "yes, for you see, I have no money left"; however, if you consider both you and me as 1 system, then the money just made a transfer.
 
  • #64
Matterwave said:
Energy is never "used". It's not like energy just disappears, it just gets transformed to a different form. This is the law of conservation of Energy.

It's like my money. If I give my money to you to buy a hamburger, my money doesn't just disappear, it gets transferred to you! So if you say "hey did you use up that money?", I might say "yes, for you see, I have no money left"; however, if you consider both you and me as 1 system, then the money just made a transfer.

It's fungible baby, like goooold. :wink:
 

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