1. Mar 26, 2009

### the-genius

When asking about twin paradox, people explained by telling me that the condition isn't symmetric as the accleration isn't relative.
If accleration isn't relative then can you answer this:
suppose I place you and your freind in space, far from everything else and also far from each other. Then I will apply gravitational pull on one of you only thus acclerating one of you. Each of you will see other acclerating away. Now to find who is the one I am applying force to acclerate, what experiment would you carry out to find if you are in "real accleration" or not?
(if you throw a stone, it will still appear to go away in uniform velocity whether you are acclerating or not, as my gravitaional force acts not only on you but everything you throw.)
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Also answer my these elementary question about the two clock A and B.
If I move away clock A and bring it back to B, which will be slower?

If Clock A moves away from clock B (as seen by clock B) with uniform velocity then will the time on clock A continue to change with that of B or maintain a constant diffrence (from the synchronized time)?

Suppose Clock A revolve round clock B (then for B, A is acclerating as velocity is constantly changing), what effects will be there on the times, they record.