1 Resolution of the Ehrenfest Paradox

In this article a possible resolution of the famous Ehrenfest paradox [1] is offered. The paradox relates to a spinning disc and the Special Relativity Theory (SRT) applied to it. The resolution of the paradox is based on the proposition that the paradox results from an incorrect application of SRT to a system that is not in inertial motion. The centrifugal and centripetal forces resulting from the rotation are always present and need to be included into considerations. Using the previously derived metric for a centrally gravitating body the effect of the centrifugal and centripetal forces can be included. When this is correctly done no paradox is obtained and it is shown that the spinning disc has flat space-time geometry. The measured data from the experiments conducted on such rotating systems are explained by inertial mass increase as described by SRT