Gravitational forces forces are inertial only. Also there is no ''potential gravitational energy'' beyond energy contained in the mass <math>m</math> of any particle, which is now a counterpart of the old Newtonian ''potential energy'' as there is no other ''potential energy'' in the universe. Especially no negative energy exploding in the Big Bang event, at the beginning of the universe, since Einstein's universe being eternal doesn't have any beginning. | Gravitational forces forces are inertial only. Also there is no ''potential gravitational energy'' beyond energy contained in the mass <math>m</math> of any particle, which is now a counterpart of the old Newtonian ''potential energy'' as there is no other ''potential energy'' in the universe. Especially no negative energy exploding in the Big Bang event, at the beginning of the universe, since Einstein's universe being eternal doesn't have any beginning. |