Preferred Frame - Inertial Frames Preferred Above Noninertial Frames

Inertial Frames Preferred Above Noninertial Frames

Although there is no preferred inertial frame under Newtonian mechanics or special relativity, the set of all inertial frames as a group may still be said to be "preferred" over noninertial frames in these theories, since the laws of physics derived for inertial motion only work exactly in this special category of frames.