Inertial Objects: Acceleration & Direction

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Thread starter jaketodd
Start date Sep 24, 2018
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Acceleration Direction Inertial

In summary: This is a really good question, and it gets at the heart of why Einstein's theory of gravity (general relativity) is so different from Newton's theory of gravity.In Newton's theory, there is an absolute space and an absolute time, and if you are at rest relative to that absolute space and time, you feel no acceleration. If you are accelerating, you are definitely not at rest relative to this absolute space and time. That's pretty simple, right?But in Einstein's theory, there is no such thing as an absolute space and an absolute time. Instead, space and time are relative, and so is acceleration. So an object's acceleration can only be measured relative to some other

Sep 26, 2018

PeterDonis

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jaketodd said:

on stepping back a moment, it doesn't matter whether we use proper velocity, or coordinate velocity, or whatever

Yes, it does. You continue to ignore the key fact that has already been explained to you several times: any actual observable must depend only on invariant quantities. Your scenario does not disprove this at all; your repeated attempts to show that it does only show that you still don't understand the key fact I just stated. You need to stop trying to convince anyone else of your claims, and take a step back and consider that key fact carefully, and continue doing that until you understand what it means.

At this point I am closing the thread since you are continuing to repeat your errors without responding to the corrections you have been given.