Albert Einstein says A person on the earth cannot feel the rotation on the earth because that person is moving at the same speed in relation to the speed of the movement of earth. Two years back I said its not the reason, I said its because the gravitational field of that person is too weak to interact with the gravitational field of earth to give the feeling of rotation. If that is not enough I will give another example . Imagine a ball of 5 centimetre is moving through space at high speed and a small ball of 2 centimetre is sticking to the surface of that 5 centimetre ball. Don't you think that 2 centimetre ball can feel the movement of 5 centimetre ball as both have comparatively similar sizes to have mutually interactive gravitational fields? I think so.
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