It means that the force is only an '''inertial force''' with which particle presses towards its location of most probable position in spacetime. That's why introduction of [[curvatures of spacetime]] to physics the problem of gravitational force that Newton worried so much became moot. | It means that the force is only an '''inertial force''' with which particle presses towards its location of most probable position in spacetime. That's why introduction of [[curvatures of spacetime]] to physics the problem of gravitational force that Newton worried so much became moot. |