Why do the principles of physics get more complex when the frame of reference undergoes acceleration?

heelallev5 2022-08-10 Answered
Why do the principles of physics get more complex when the frame of reference undergoes acceleration?
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Answered 2022-08-11 Author has 12 answers
Your question is "why is X true," but I don't think X is necessarily true.
If you describe the motion of a projectile in the earth's frame, A, it's pretty simple. If you describe it in a free-falling frame, B, it's also pretty simple. It's not really obvious which of these is the inertial frame. A relativist would actually consider B to be inertial. In one frame there's a gravitational force. In the other there's none.
It's not even true that the laws of physics have to be expressed in a frame of reference. The standard way of expressing general relativity doesn't even involve a frame of reference.

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