Also known as inertial reference frame, inertial frame, inertial space, Galilean reference frame
frame of reference not undergoing acceleration
An inertial frame of reference is a perspective or viewpoint from which objects that have no forces acting on them appear to move at constant velocity or remain still. It matters because the laws of physics work the same way in all inertial frames, which is why scientists use them as a standard baseline for measuring and understanding motion.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).