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.
Position (vector) The term position vector is used mostly in the fields of differential geometry, mechanics and occasionally vector calculus. Frequently this is used in two-dimensional or three-dimensional space, but can be easily generalized to Euclidean spaces in any number of dimensions.