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Anonymous users2024-02-12Not at any distance. Theoretically, even if you are infinitely far away from the Earth, you cannot escape the gravitational pull of the Earth.
Gravitational force is a long-range force, and theoretically the distance is unlimited. Artificial satellites and space stations can fly around the earth outside the earth's atmosphere because they are also constantly moving forward, relying on the inertial force of forward motion and the earth's gravitational force (gravity) to balance to ensure that artificial satellites and space stations do not fall back to the earth. If satellites and space stations move slowly, they will also fall back to Earth under the gravitational pull of the Earth.
This velocity is the first cosmic velocity.
Spaceships are able to break away from the Earth's gravity and fly near other planets in the solar system because they are a little faster than the first universe and can only fly away from the Earth if they are constantly given power to overcome the Earth's gravity.
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Anonymous users2024-02-11It depends on your own mass and the influence of other gravitational forces around you.
According to the law of gravitation, gravitational force is inversely proportional to the square of the distance.
The distance between the Moon and the Earth is very close, about 30 Earth's diameters, so although the mass of the Moon is not too large, the gravitational pull on the various particles on the Earth is relatively large. The mass of the Sun is very large, about 200 billion trillion tons, which is 330,000 times the mass of the Earth, but because the distance between the Earth and the Sun is too far, 400 times the distance between the Moon and the Earth, its gravitational pull on the Earth is only 46% of the Moon's gravitational pull on the Earth. So, the tidal phenomena on Earth are a combination of the forces of the Sun and the Moon, and it is enough to understand that the gravitational pull of the Moon is greater than that of the Sun.
The mass of the Earth is twice that of the Moon, so the common mass center of the lunar-earth system must be greatly biased towards the side of the Earth, and about twice the radius of the Earth from the center of the Earth, the two spheres rotate around this common center of mass every month. The gravitational force of the Moon is important to the Earth, but the amount of this gravitational force is not very large, equivalent to only one ten-millionth of the Earth's gravity. For a 10-ton object on Earth (i.e., gravity equal to 10 tons), the gravitational force is only 1 gram.
Such a small force is usually not felt by people. But the Earth's response to this small gravitational force is very obvious. It has long been discovered that the regular rise and fall of sea water (tides) in a single day is closely related to the moon.
In addition, the earth is not a rigid body, it is generally considered to be an elastic sphere, for a sphere with such a characteristic, under the action of the gravitational force, the earth's solid rock crust will also produce a "tidal" phenomenon, called a solid tide, which rises and falls by about 30 centimeters every day. Of course, the gravitational force of the Earth on the Moon is greater, and it causes the lunar crust to protrude and fall by about 3 kilometers. At the same time, the Earth's atmosphere, because of this tidal attraction, produces "atmospheric tides" every day.
As for the ocean, which is a huge body of water, the tidal phenomenon on it is even more pronounced.
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Anonymous users2024-02-10The distance from the surface of the earth to the center of the earth is the radius of the earth.
Since the Earth is slightly elliptical, the Earth's equatorial radius is slightly larger than the polar radius.
The Earth's equatorial radius is kilometers; The polar radius of the Earth is kilometers.
The average radius of the Earth is kilometers.
So you're right.
Earth's radius.
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Anonymous users2024-02-09That's right, it's 6,371 km. The radius of the Earth is kilometers, and this number is the average of the distance from the center of the Earth to all points on the Earth's surface. The radius of the earth is the distance from the surface of the earth to the center of the earth.
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Anonymous users2024-02-08The radius of the Earth's equator is kilometers, the polar radius is kilometers, and the average radius is about 6371 kilometers.
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Anonymous users2024-02-07The distance from the Earth's surface to the center of the Earth is 17 kilometers at its closest and 314 kilometers at its farthest.
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Anonymous users2024-02-06No matter how many meters you lift off, you can't escape the gravitational pull of the Earth.
Gravitational force is non-directional, it can be understood that the range of gravitational force is unlimited, and the gravitational pull of the earth will only weaken with increasing distance but will never disappear, so the gravitational pull of the earth exists no matter how far away from the earth.
If the initial velocity reaches the planet's escape velocity, the object will completely escape the planet's gravitational pull and fly out of the planet. The velocity at which the object needs to escape the gravitational pull of the planet is called the escape velocity. The minimum velocity required for an object on the surface of a celestial body to free itself from the gravitational pull of that celestial body and fly into space.
The Earth's detachment velocity is kilometers and seconds (i.e., the second cosmic velocity).
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Anonymous users2024-02-05The Moon's perigee to Earth is 363,300 km, and the farthest apogee to Earth is 405,493 km. In other words, we are about 400,000 kilometers away from the earth, and we still have not escaped the gravitational pull of the earth. At a distance of 6,000,000 kilometers from the Earth, i.e. 6 million kilometers, an adult experiences a gravitational pull of 10 microns square seconds.
Taking the Earth's orbit around the Sun as an example, an object in space is subject to the gravitational pull of the Earth and the Sun, as well as the centrifugal force of its own motion. If the force of force on this object is directed towards the Earth, it is within the Hill sphere of the Earth, and it orbits around the Earth. If a person is stationary relative to the Earth, certainly not absolutely, and assumes to leave the Earth at an extremely slow (tending to zero) speed, then no matter how far away from the Earth is, that person cannot escape the Earth's gravity!
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Anonymous users2024-02-04The altitude that the spacecraft has to fly to be completely free from the gravitational pull of the Earth.
1. According to the gravitational formula f=gmm r 2 When the object moves at a speed of the second cosmic velocity (, it can break away from the gravitational force of the earth, and the first cosmic velocity is, and the object can just revolve around the earth when it reaches this velocity. Speed reached.
2. According to: f=gmm r 2=mv 2 r m elimination, m is the central celestial body, and the mass of the earth is 6 10 24kg v= r, that is: the gravitational force is just right to balance the height at which it can rotate around the earth, that is:
The altitude of the spacecraft can be completely detached from the gravitational pull of the Earth.
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Anonymous users2024-02-03You can never get rid of the gravitational pull of any object, including the gravitational pull of an ant on you! You can look at the gravitational force formula. The escape velocity so-called escape refers to:
In an orbit of a certain radius, the gravitational force of an object rotating around the planet is equal to the centripetal force, and the orbit remains stable. If the velocity of the object increases, the orbit must be increased, and the radius must also be increased, and when the radius increases to a very large size, it can be approximately regarded as an escape! Actually, you'll never be able to escape, and if your speed doesn't increase, you'll still be lured back!
It's just that the orbit of the elliptical has become larger and flattened!
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Anonymous users2024-02-02Theoretically, the gravitational pull of the Earth is infinitely far away, but it is infinitely close to zero as the distance increases. For example, it takes 11 kilometers to escape the Earth, but the farther you are from the Earth, the smaller the amount you need to break free from the Earth's gravity.
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Anonymous users2024-02-01The following people, use more brains, less of those theories, gravity has a valid value, beyond that distance, gravity is equivalent to failure, just like the attraction of a magnet to iron! The brain is a good thing, don't stumble formulas and theories all day long, practice is the best proof! According to your kind of theory, how can science progress?
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Anonymous users2024-01-31Leaving the atmosphere allows you to escape the gravitational pull of the Earth.
There are five types of terrain on land, including plains, hills, plateaus, mountains, basins.
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