Movement

Movement - one of base physical concepts and one of the most obvious properties of a matter. The person by means of muscles can move those or other parts of the body and move from a place of a pas a place; it can actuate other bodies; he is able to use the energy hidden in natural toplivah to force to move various types of transport. The person knows that if the effort movement will stop also will stop. In that case, apparently, there is nothing more naturally to assume that movement is something such that demands effort, and remains, only while the effort is put. Such representation has been stated by Aristotle; being it is proclaimed by so great authority, it was taken on trust by scientists within many centuries. Требуется китайская виза Киров? Доступно!

And after all there were obvious proofs of abnormality of this statement. The trajectory of the body thrown at an angle to horizon is bent. Why? Aristoteleva the logic asserted that for movement of a body it is necessary for it to inform an impulse; the impulse should remain invariable during some time, causing body movement at an angle to horizon upwards; then the impulse should weaken gradually therefore there is a bent part of a trajectory, and, at last, it should disappear, then the body can freely fall. If this picture was true, the final part of a trajectory of such body would be vertical. But anybody, probably so did not reflect and if reflected the conclusions reasonably did not express.

Really great mind was necessary to break this barrier and to look at a movement problem in a new fashion. The first push in this direction has given Galilej.

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