Four Fundamental Forces - What Is the Fourth?

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Discussion Overview

The discussion revolves around the nature of the four fundamental forces in physics, particularly focusing on gravity and its classification as a force. Participants explore the implications of gravity being a result of space warping rather than a traditional force, and question the existence of a fourth force in this context.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Exploratory

Main Points Raised

  • Some participants argue that gravity is not a force but rather a warping of space caused by mass, suggesting that this interpretation leaves only three fundamental forces.
  • Others propose that if gravity can be quantized within the framework of quantum field theory, it could be considered the fourth force, as forces are associated with the exchange of bosons between fermions.
  • A participant challenges the notion that gravity should not be classified as a force, stating that it behaves like one and that the argument against it does not logically follow.
  • There is a suggestion that the relationship between mass and space involves an unknown property or force that causes the warping of space, raising questions about the nature of this interaction.
  • One participant expresses uncertainty about the ontology of space-time and invites clarification on their understanding of mass and its effect on space.

Areas of Agreement / Disagreement

Participants express differing views on whether gravity should be classified as a force, leading to an unresolved debate regarding the nature of gravity and the existence of a fourth fundamental force.

Contextual Notes

Participants acknowledge limitations in understanding the fundamental nature of space-time and the properties of mass, indicating that the discussion is exploratory and lacks definitive conclusions.

thetexan
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four forces?

There are four forces supposedly. But isn't gravity not a force. It appears like a force but what we see as effects of gravity is really a warping of space due to the effects of mass on that area of space. In other words, there is really no force causing things to attract. They appear to attract due to a warping of their space but the true cause of the apparent attraction is something else.

Doesnt that leave us with just three forces? But then, what causes mass to have an effect on space?

tex
 
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I heard that we are trying to quantize ''general relativity theory''.I think that if we can quantize the space-time metric into quantum particle then it is natural to call ''gravity force'' being 4th force.Because ''force'' in QFT is the exchange boson particles process between fermions.
 


You are getting all tangled up in language. First, there is no reason not to call gravity a force. It acts like a force. Second, even if that were not true, your statement is "because gravity doesn't have every property of a force, it must not have any properties of a force" which does not follow.
 


I don't mean to make any conclusion if I seemed to do so.

There is something about mass that tends to warp space. Cause and effect. The first question is what is that something that warps space. It is probably some kind of different force (different from the first three) or it is some property of the three we don't know about. In any case there is something going on in the relationship between mass and space.

We think of gravity as a force that attracts two massive objects when, rather, we believe that the effect we think of as attraction is really just a redirection of an object due to the fact that the space between the two objects causes movement toward each other that we think of as an attraction rather than a redirection due to space warpage.

I guess the question is what is it about mass that warps space. It must be a force. There must be some kind of communication between the mass and the surrounding space. Otherwise space would not be aware of the presence of the mass. Of course, one method to warp space with no communication or force would be simple displacement...the physical presence of the mass displaces an otherwise pristine space forcing it out of shape by simply moving it out of the way. Similar to me taking my fist and pushing against and displacing a rubber membrane. What force is that? When one jumps into a pool of water and the water moves out of the way of the body, which of the four forces can that be attributed to?

tex
 


I think that we must content with axiom of mass warp space-time.Because we do not ''really'' understand the ontology of space-time(to nowadays).Please teach me some things if I am wrong!
 

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