Hi Meri SITARA i don't know that you are the south pole of the earth where as i am in the north . Or you are in Nepal , I am in USA. i try to reach you when the earth revolve. But you moved with the same velocity. You and i are in the two frame of reference which are not accelerating. The relative velocity between you and me is zero. Lets hope we can meet if you stoped to move or i accceletate. Thanks Yours Mathematician