July's full moon will rise in the sky at 6:57 p.m. EDT on July 19. Commonly known as the Full Buck Moon, this month's full moon symbolizes the time of year when male deer rear their new antlers. More
Motion (physics) In physics, motion is a change in position of an object with respect to time. Motion is typically described in terms of displacement, distance, velocity, acceleration, time and speed. Motion of a body is observed by attaching a frame of reference to an observer and measuring the change in position of the body relative to that frame.
Definition of RELATIVE MOTION. 1. : motion as observed from or referred to some material system constituting a frame of reference (as two adjacent walls and floor of a room) â see relativity 3. 2. : the motion of one body with respect to another regarded as fixed â compare relative velocity. ADVERTISEMENT.