#### Swank

##### and debonair

- Joined
- Feb 25, 2022

- Messages
- 2,031

It seems like this is part of living in a relativistic universe. With no set base velocity, how could you say how far into an acceleration curve you were in? You'd end up with situations where you could manufacture energy from the differential in the force required to put two objects in identical orbits via different acceleration. It would be an unbalanced mess.A philosophical concern rather than a physical one. Why this particular relationship between Force, mass and acceleration? Why notF =ma^2,F =ln (ma) orF^2 = 1 / (m cosh (a) ) or any of the infinite number of different mathematical relationships I could posit?

While these make more sense stated as three laws, they really are the same law from different points of view. Take the linguistics out of it and it is one symmetrical law.Sure this is Newton' s first law. Nice. And F = ma is Newton's 2nd law, and we have Newton's third: for every action there is an opposite and equal reaction. Yet some of the concepts used in all three are fundamentally axioms that I can still ask: why do we observe the universe seemingly applying these axioms? Are there deeper reasons?

Imagine a universe where two identical objects orbiting a planet a millimeter apart would need to change orbit if they touched and therefore doubled in mass. It doesn't seem like there are a lot of other options besides F=MA.

Broon, you are a physicist, correct? I was hoping someone could answer this:

Given that you can get to places in the universe with a high degree of local time dilation without needing to expend the force normally associated with high acceleration reference frames, how would you

*know*you weren't in a place with a greater degree of dilation?

I'm thinking of the

*Interstellar*thing, where traveling to and from a world orbiting closely around a black hole can be accomplished without the kind of acceleration needed to get to a large percentage of lightspeed. Given that the dilation changes the way you observe the outside universe, would that change in observation hide the fact that the center of the galaxy's black hole is much, much bigger than we think, and the Milky way exists in a relatively high degree of dilation - affecting our observations about the rest of the universe's red shift?