Inertial frame of reference: Difference between revisions

The motion of a body can only be described relative to something else—other bodies, observers, or a set of spacetime coordinates. This motion is also called [[relative velocity]] when both objects are in motion. These are called [[frame of reference|frames of reference]]. According to the first postulate of [[special relativity]], all physical laws take their simplest form in an inertial frame, and there exist multiple inertial frames interrelated by uniform [[Translation (physics)|translation]]:{{anchor|principle}}<!--