Gravity: after Einstein, is it really a force?

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Discussion Overview

The discussion revolves around the nature of gravity in the context of Einstein's theory of general relativity, particularly whether gravity should be considered a force or an effect of space curvature. It also touches on the implications of unifying gravity with other fundamental forces and the potential impact of higher dimensions as proposed in M-theory.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant suggests that gravity could be viewed as an effect of the curvature of space, similar to how centrifugal force is considered an apparent force due to inertia.
  • Another participant agrees with the idea of gravity as an apparent force but emphasizes the importance of unifying gravity with the other three fundamental forces to reconcile general relativity and quantum mechanics.
  • A later post introduces a new question regarding the implications of discovering additional dimensions on relativistic equations, particularly in the context of M-theory.

Areas of Agreement / Disagreement

Participants express differing views on whether gravity should be classified as a force or an effect, and while there is some agreement on the nature of gravity as an apparent force, the discussion remains unresolved regarding the unification of gravity with other forces and the implications of higher dimensions.

Contextual Notes

The discussion includes assumptions about the nature of forces and the relationship between gravity and other fundamental forces, as well as the potential impact of higher dimensions, which remain unresolved.

Phenylflux
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I'm not a great scientist or math guru, I was in the naval nuclear power program and only pursue physics as a hobby. My question is this: according to Einstein gravity results from the curvature of space. If that is so wouldn't it be reasonable to say that gravity is an effect resulting from the curvature of space? Just like centrifugal force isn't really a force at all, but an APPARENT force resulting from the laws of inertia? If that is correct, why try to unify gravity with the other three forces? We don't try to unify centrifugal force with them, or am I way off base? Any replies would be appreciated.
 
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Phenylflux said:
I'm not a great scientist or math guru, I was in the naval nuclear power program and only pursue physics as a hobby. My question is this: according to Einstein gravity results from the curvature of space. If that is so wouldn't it be reasonable to say that gravity is an effect resulting from the curvature of space? Just like centrifugal force isn't really a force at all, but an APPARENT force resulting from the laws of inertia? If that is correct, why try to unify gravity with the other three forces? We don't try to unify centrifugal force with them, or am I way off base? Any replies would be appreciated.

You are right about the GR picture of gravitation as an apparent force. However, unifying gravitation with the other three forces really comes down to reconciling GR and quantum mechanics. You may be interested in this recent thread.
 
Thank you for the clarification I will check out the thread
 
New question: with m theory they look to higher dimensions to be able to include gravity. With relativity relying on four dimensional coordination, if we do discover an additional dimension, how will that impact the relativistic equations?
 

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