Why is gravity different in space than on Earth? Detailed answer

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Why is gravity different in space than on Earth? Detailed answer

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Why is gravity different in space than on Earth?

Every object in the universe acts on another object, they attract each other. This is called gravity, or gravity. The force of attraction, or gravity, depends on two factors. Firstly, it depends on how much substance the object, body, object contains. The greater the mass of the substance of the body, the stronger the gravity. If a body has very little mass, its gravity is small.

For example, the mass of the Earth is many times greater than the mass of the Moon, so the Earth has a greater gravitational force than the Moon. Secondly, the force of gravity depends on the distance between the bodies. The closer the bodies are to each other, the greater the force of attraction. The farther they are from each other, the less gravity.

Now let's look at human existence on Earth. The Earth has more mass than a person, so gravity keeps him on Earth. But the Earth acts as if all its matter, all its substance are in the center. Therefore, the force of gravity anywhere on the Earth must be calculated taking into account the distance to its center.

The force of gravity on the coast of the sea is greater than on the top of the mountain. Now imagine a person who has retired from the surface of the Earth for a long distance. There, the force of gravity will be much weaker. When a person is in space, he completely disappears from the field of gravity. The Earth's gravity does not affect him at all. He is in a state of weightlessness. Therefore, rockets, spaceships, astronauts can fly freely in open space.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

Who first said: Whoever enters us with a sword will die by the sword?

The expression "whoever enters us with a sword will die by the sword" does not belong to Alexander Nevsky. Its author is the screenwriter of the film of the same name Pavlenko, who remade the phrase from the Gospel "those who take the sword will perish with the sword."

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Gennady
Absolute misunderstanding of the theory of the force of gravitational attraction between bodies, which is ALL-PENETrating in space, according to Newton's law. Alas, there is no escape from the force of gravitational attraction even in space (anti-gravity has so far been discovered only in science fiction books). Why fly to Mars, because the Moon is kept in orbit around the Earth only by the force of the Earth's gravitational attraction, not to mention near-Earth vehicles and astronauts in them! By the way, the law itself was deduced in its final form by the great sir Newton from the analysis of the motion of the PLANETS of the solar system: Gravitational acceleration between two bodies is proportional to the product of the masses of these bodies and inversely proportional to the SQUARE of the distance between the centers of mass of mutually attracting bodies! For the FIRST TIME, Newton himself came to the SQUARE of distances from the analysis of astronomical measurements of other scientists. A STATE OF WEIGHTLESSNESS is the fall of any material body, for example, in space with gravitational acceleration created by the massive body CLOSEST to YOU, for example, the force of the Earth's GRAVATION, provided there is NO IMPACT OF OTHER FORCES, for example, the thrust force of an engine or the force of aerodynamic resistance of the atmosphere. If there were no gravitational force of attraction, then all spacecraft would instantly DESCENT from near-Earth elliptical orbits around the Earth and fly away from the Earth along ALMOST RECTIOLINEAR trajectories into space at speeds equal to their orbital velocities around the Earth and would already become satellites of the NOT conditionally missing Earth , but satellites of the Sun! However, the planets of the solar system will also SHUTTER in all directions along rectilinear trajectories into boundless space if the Sun suddenly disappears. And in general, ALL space objects are held by the forces of gravity. Otherwise, chaos and Brownian motion after collisions of cosmic bodies! Let's go back to Earth. If, for example, you are sitting on a chair, then in addition to the force of attraction, you are also affected by the force of the SUPPORT from the side of the chair, which BALANCES THE FORCE OF ATTRACTION (force of weight). The internal sensations of human organs hanging on ligaments and membranes relative to the skeleton, while on the surface of the Earth, at the same time, we usually associate with the force of ATTRACTION, although they are actually connected NOT with IT, but with the SUPPORT FORCE applied to us OUTSIDE ON OUR SKELETAL and then on ligaments and membranes to hold the internal organs outside and numerically equal to the force of attraction. If further, excuse me, KNOCKING a chair out from under you, then the power of the SUPPORT will disappear, and you will find yourself UNDER THE INFLUENCE OF ALREADY ONLY ONE FORCE OF ATTRACTION, which cannot disappear anywhere, i.e. You will experience a STATE OF WEIGHTLESSNESS, consisting in FALLING towards the center of the EARTH UNDER THE ACTION of gravity with a gravitational acceleration of ~7,8 m/s2, however, the flight will last only until the nearest obstacle on the accelerated path of your fall to the center of mass of the Earth. But this state of FREE FALL IS NO LONGER ASSOCIATED with any UNPLEASANT FEELINGS from the need to maintain the internal organs of the organs through the ligaments relative to the human skeleton and is perceived by him as a LIGHT WEIGHTLESS RELAXED state, as if no forces DO NOT AFFECT the body AT ALL. HOWEVER, IT IS NOT. It is THIS LIGHTNESS that is the STATE of the body during accelerated MOVEMENT UNDER THE ACTION OF THE FORCE OF GRAVITATIONAL ATTRACTION, which was specially singled out and CALLED MASS FORCE, i.e. force EQUALLY affecting every unit of mass of any body! Both the pen and the hammer fly with the same gravitational acceleration (although the forces of attraction acting on them are DIFFERENT and proportional to their masses), if there is no effect of the aerodynamic drag force.

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