Motion
In Physics, motion is explained as a change in position of an object overtime. It is described in terms of: Displacement, distance, velocity, acceleration, time and speed. If the position of a body mass is not moving or in motion, the mass is said to be at rest, motionless, or immobile.
An objects motion cannot change unless acted upon by a force. As there is no way to tell, you can never truly determine when an object is in absolute motion.
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