Assuming that an absolute stationary inertial frame exists in the universe and the speed of light is constant only in the absolute stationary inertial frame, new equations for inertial mass, momentum and kinetic energy in a moving inertial frame are derived.
In the process of deriving the new equations, an experiment was presented to obtain the velocity of the inertial frame moving relative to the absolute stationary inertial frame. If this experiment is successful, we could find out how fast and in which direction our Earth is moving in space.
