peoples

The movement of object

1. The motion of object

[The persons who understood the motion of object]

Most of us cannot deeply understand the motion of object. We have only scratched the surface of the phenomena. The motion is a marvelous event in this world.

What is movement? -

Theoretic physicists develop a hypothesis and try to find ways to prove that it is correct.

Zeno -

Motion is impossible because at each instant of time an object has to be in a particular position, and since an interval of time is made up of instants, it can never move.

Aristotle -

He had proposed that moving objects had a natural tendency to slow down and stop. If the mover did not maintain contact with the body , the body stopped instantaneously. He explained that a object can be kept in motion only if the object is in direct contact with a continually "operating mover." Force is always required for movement of body. His misleading concept of motion dominated the theory of motion of the world during the 1600s .............and other greek philosophers.

St. Augustinus -

Time is a certain kind of extention. Time is not the motion of a body. If I did not see when it began to be moved and if it continued to move so that I could not see when it stopped I could not measure the movement.

Ockham -

He argued that a object in motion dose not require the physical contact of a mover to keep it moving . He understood the concept of inertia.

Ockam's razor: "When you hvae two competing theories which make exactly the same prediction, the one that is simpler is the better."

Copernicus -

He studied the movement of objects in the heavens. He believed that the planets move in circular orbits around the sun.

Kepler -

He formulated his Three Laws of Planetary Motion.

1. All objects in the heavens move in elliptical, not circular orbits

2. The line from the sun to a planet sweeps out equal areas in equal times.

3. The orbiting period of a body squared divided by the orbiting radius of that body cubed is equal to a constant which is a universal invariant for all orbiting bodies. His Law influenced the development of Newton's law of universal gravitation

Galileo -

"Why does some object keep moving even after the force applied to it goes away" Galileo studied the free fall motion geometrically. He concluded that all bodies fall at the same acceleration. He formulated the concept of inertia and objected to Aristotle's hypothesis. He overtuned Aristotles's "operating mover." Before Galileo, it was accepted that force was always needed to keep an object moving with constant velocity. The theory of relativity was discoverd by Galileo.

Descartes

He asked himself " Why the object falls to earth. His three laws of nature influenced Newton.
"When a body comes upon another, if it has less force for proceeding in a straight line than the other has to resist it, then it is deflected in another direction, and retaining its motion, changes only its determination. But if it has more, then it moves the other body with it, and gives the other as much of its motion as it itself loses."

Newton -

He is famous by reason of his three laws of motion. He introduced light's motion into physics.

Einstein -

All kinds of the concepts of motion were absorbed into Einstein and the concepts flowed again from Einstein. As he introduced the speed of light into motion theory, he formulated the theory of relativity.