Why all things fall down when they lose their foothold, and the person podprygnuvshy up, it is again on the earth?The answer lies in the fundamental laws of physics and gravity is explained (in translation from the Latin - "heavy", "significant") or, in other words, the attraction of the earth, an inherent property of matter.The essence of this phenomenon consists in the fact that all bodies are attracted to each other.For example, the Earth keeps its gravitational force on itself absolutely everything: trees, houses, people, water, etc.Due to gravity we walk, not fly away in the space of the universe.
What is the force of Earth's gravity, if it can not be seen or felt?The fact that it is a very delicate interplay depending on the distance between objects, as well as their weight.If the mass of the object is small, the force of its gravity and, accordingly, will be weak.Therefore, speaking about small things, you can say that it is totally absent.Even such large bodies like the mountains, the attraction is only 0.001% over the earth.
However, if we consider the stars and planets, the gravitational force becomes noticeable because of their size and weight many times greater than what surrounds us.And the reason why all the items fall down, because the mass of our Earth is considerably greater than in humans or in any other object.Because of this, it would be fallen leaf on the floor and not be attracted to some standing next to the body.Although gravity and independent of the distance (the closer the objects are arranged to each other, the stronger their mutual attraction), nevertheless has a planet mass significant effect on gravity.
Now the question may arise: why all objects fall down, and the moon - not?This phenomenon is explained by the fact that due to the constant motion of the Earth around it under the force of gravity is held.Now, if the moon was, and does not rotate, it is like any other object, it too would fall in accordance with physical laws.
principle of universal gravitation Newton, English scientist discovered.He was the first to prove its existence and influence on all objects of the universe.It is this force makes all the planets move around the sun, man - walk on the ground, and apple - fall down.Act to gravity (aka the law of gravity) states that all bodies are sent to the Center of the Earth to give the acceleration of gravity.This discovery had a tremendous impact on the development of the exact sciences and to humanity as a whole.Thanks to him, scientists are able to determine with great accuracy the mass of the satellites of the planets, as well as the position of celestial bodies, automatic devices and the trajectory of their movement in the sky for several decades ahead.This law explains why all objects fall down, why not water splashes out into space, the occurrence of high and low tides.In addition, it allows you to discover new universes, not only by observing, but also with the help of mathematical calculations.
