Gravity-like Force: Is Another Force Weaker Than Gravity?

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The discussion centers on the hypothesis that if a force similar to gravity exists, it must be weaker than gravity due to the lack of observational evidence. Participants argue that the absence of such a force suggests it cannot exert a significant influence, as gravitational effects are consistently observed. Theoretical skepticism is also highlighted, particularly regarding the coupling of this hypothetical force to the stress-energy tensor, which complicates detection.

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Is it true that if there was another force similar to gravity (dependent on the stress-energy tensor) then it would have to be weaker than gravity? If so, why?
 
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Because we have not observed such a force which should supplement gravity.
 
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accdd said:
If so, why?
We have not observed any such thing,so if it exists it must be weaker than what we are able to observe, and we do observe gravitational effects.
(There are also some good theoretical reasons to be skeptical of the possibility).
 
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If it couples to the stress-energy tensor just as gravity does, how could you ever tell?
 
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