12/14/2023 0 Comments Definition of motionMagnitude of the displacement for a course of motion may be zero but the corresponding distance covered is not zero. Magnitude of the displacement is not equal to the distance traveled by an object. The shortest distance measured form the initial to the final position of an object is known as the displacement. The numerical value in physical quantity is its magnitude. Motion of the object is described by the numerical value and not the direction of motion. Initial position of an object is described by a specific reference point which is called as origin. Motion may be in a straight line, or in circular path, or rotate or vibrate in nature. Earth, planets, stars, galaxies, atoms, molecules, blood in the body are all the examples of motion. Laws of motion, three axioms, which have been shown by Sir Isaac Newton, as follows:- ( 1) every body perseveres in its state of rest, or uniform motion in a straight line, until a change is effected by the agency of some external force (2) any change effected in the quiescence or motion of a body, is in the direction of the force impressed, and is proportional to it in quantity and ( 3) action and reaction are equal and in contrary directions.ġ914 - Nuttall's Standard dictionary of the English language By Nuttall, P.Austin.Motion is defined as the change in position of object with time. Accelerated motions, those which are continually increasing or diminishing in velocity, while equable motion continues uniform. Angular motion, the motion of a body as referred to a centre about which it revolves. Absolute motion, that which is independent of any other motion or retarding power. Quantity of motion, the product of the mass or moving body by the velocity. Motion in court, an occasional application of the court, by the parties or their counsel, for the purpose of obtaining some rule or order of court which becomes necessary in the progress of a cause.
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