Science a GoGo's Home Page Forums General Discussion General Science Discussion Forum Do orbiting bodies accelerate?

I can't answer you questions without nominating a framework they differ markedly depending what you choose.

1.) Is the same for all frameworks .. YES

The rest depends which framework you choose.

You have agreed on the problem classical physics runs into with "hidden" forces and GR gives us a different way to look at things but it changes some definitions.

GR may not ultimately be exactly correct but it is giving us more answers with fewer "hidden" forces and you can resolve all the answers back to classical physics, so why wouldn't we use it?