The earth has a gravitational pull on everything, so why can air float in the air?

It is because of the gravitational pull of the sun that the earth will only revolve around the sun and will not fall.

We all know that there is a gravitational pull on Earth, so we humans and other living beings are attached to the surface of the Earth and cannot be suspended in mid-air, while in outer space.

, there is no gravity, such as sitting on a spaceship.

Astronauts who land in outer space can levitate in mid-air without falling.

The first is that the earth is not only suspended in the vast universe, its relative position is unchanged when it is suspended, in addition, it not only rotates when it is suspended, but also revolves around the sun, if the earth is suspended just because there is no gravity in outer space, then it should do irregular motion when it is suspended, that is, the earth will float around in the vast universe like a balloon released by man, instead of both revolving and rotating in the same position, therefore, The reason why the earth can be suspended in the universe without falling is not because there is no gravity in the universe, but because there are other reasons.

The reason why the earth can be suspended in the universe and the position remains the same is related to the gravitational attraction of the sun, assuming that the sun has no gravity, then the earth will fall, and the direction of its fall is just pointing to the sun, but in fact the sun has gravity, this gravitational force is holding the earth, the direction of the sun's gravitational force forms an angle with the direction of the earth to fall, and this angle is unchanged, so the earth cannot fall on the sun's head, but keeps moving in a circle around the sun.

This is known as the revolution of the Earth.

When the earth revolves around the sun, it is centered on the sun, and no matter how the earth rotates, the distance between it and the sun is constant, and the sun is like a Ferris wheel.

The middle axis is the same, and the big circle around it revolves around it, so as long as the position of the sun does not change, then the relative position of the earth does not change, and it will remain suspended in the universe as always, and will not drift everywhere because of it.

To sum up, because of the gravitational pull of the sun, the earth is suspended in the air.

Because the air molecules are too light and too small in mass, they are easily disturbed, just like a drop of ink falling into water, the ink will float in the water, imagining the water as a space, and the ink is the air in it, floating in the air. Another reason is that most of the air is concentrated on the ground due to the gravitational pull of the earth, and "the air floating in the air is actually squeezed out by the air below."

In addition, the Earth still attracts the atmosphere, including the stratospheric ozone layer, otherwise these gas molecules would have escaped long ago.

Because the mass of the air is very light, the earth has not only gravity but also centrifugal force, so the air can float in the air because of the centrifugal force, but the air cannot escape the gravitational pull of the earth.

Because air is less dense and its weight is smaller, it may move in a circular motion according to gravity.

The Earth can be suspended in space, what is the reason exactly?

The earth and people are subject to the gravitational pull of the sun at the same time, so the earth and people remain relatively stationary. When the gravitational force suddenly disappears, people and the earth move in the tangential direction of velocity at the same time. Because before the gravitational force disappeared, the speed of man and the earth was equal, so man and the earth were still relatively stationary.

So, people don't float up.

2 With physics.

Analysis of the forces on earthling: Under normal circumstances, people on the earth have both gravitational and supportive forces. When the gravitational force suddenly disappears, then the person is only affected by the support force, and the force is unbalanced, so the person will float up.

Without gravity, the earth would float.

Objects on Earth will have no gravity as if they were in space, and people will float in the air.

The moon also has gravity, but no one. If the earth loses even gravity, will there be people, will there be people who will consider whether they will "float"? "No one can know".

Categories: Education, Science, >> Science & Technology.

Problem description: Air is also a quality thing!

Analysis: Do you know the Brownian effect? This is an irregular motion of microscopic particles.

It suggests that microscopic particles behave very differently from macroscopic objects.

Air has mass, but air molecules belong to microscopic particles. They have the property of spreading around, like if you fill some carbon dioxide into an airtight container, it will fill the whole space.

The air will actually always try to fill the entire universe.

However, air has mass, and it will be pulled by the gravitational pull of the earth. That is, gravity tends to compete with the diffusion of air. The gravitational force near the ground is larger, and there is more air that can be pulled, that is, the air near the ground is dense. And the air corresponding to it at high altitude is relatively thin.

In addition, it is worth noting in the reply upstairs that mass is a property of matter and has nothing to do with gravity.

For quite some time, there is a concept that has prevailed among some people, and that is the hollowness of the earth. These people believe that in the earth's crust, there is an underground world that has not been discovered by humans, and the liquid molten core of the earth is the sun of the underground world. Otherwise, how could the Earth float in space instead of falling?

This question seems to be easy to understand, and has nothing to do with the interior of the earth. We know that all the planets in the universe are suspended in the universe, which is different from the buoyancy of the sea, but because the universe is vacuum, and there is no gravity under vacuum conditions, and all kinds of matter will naturally float in the universe, bound and moved by the gravitational pull of various planets.

In vacuum, there is no such thing as an up-and-down concept. You can think of cosmic space as a two-dimensional canvas. This two-dimensional canvas is suspended in the air, and the large and small planets are placed on this canvas, naturally forming "grooves" of greater or lesser size, allowing the surrounding planets smaller than it to get close to it.

This is the gravitational pull between planets. But the reality of the universe is different from this experiment.

If it were the same as the experiment, the Earth would have been sucked directly into the Sun, rather than moving in a circular motion around the Sun. The reason why the earth is suspended is because of the vacuum conditions of the universe, and the current state of the earth in the solar system is related to the formation of the solar system. In the universe, any galaxy starts out as a nebula.

As the nebula gradually shrinks, it forms a primitive centripetal motion. In the process of collapsing, nebulae and dust turned into various planets, but this movement did not stop, which may be the original driving force of the Earth's revolution and rotation. Don't look at the universe from the perspective of your own life, otherwise you won't be able to draw any real conclusions.

What do you think?

The Earth revolves around the Sun because the mass of the Sun is much greater than that of the Earth, and the mass of the center of the Milky Way is much greater than that of the stars, so the stars can only move around it. So part of the Earth's rotation energy** comes from gravity. This gravitational pull has the gravitational pull from the sun and also the tidal force from the moon.

1.One is that the universe is a vacuum environment without any resistance, so the planet will move in a definite direction by inertia, or follow a definite orbit under the gravitational pull of a large celestial body. 2.

The second is that the forces experienced by the planet in space in all directions are equal, and there is a gravitational force.

This is due to the fact that the universe is in a vacuum and there is no resistance. The earth has already maintained a state of rotation when it first appeared, so Congqing can always produce a state of rotation, which is also the energy provided by the coarse pre-core of the earth. This is due to the attraction to other planets, which is why it is able to create a suspended state.

It is affected by the gravitational pull of the sun, so there will be energy, because the earth has gravity and its mass is very small, so it can be suspended in the universe.

Good question, I have the same question.

If you want to know the situation of non-contact, first understand the contact.

First, the object is in contact with the Earth. The gravitational force on this object is the sum of the centripetal force and the gravitational force.

At this point, due to the support force and gravity, its resultant force --- direction perpendicular to the earth's axis and pointed towards the earth's axis due to the support force and gravity. That is, the object moves in an approximate circular motion at a fixed latitude. Gravity points to the center of the earth.

But when the object is suspended nearby without contact with the earth's surface, the object is only subject to gravity, and it moves in a circle around the center of the circle.

This is made by senior one students, please bear with me if there is any deficiency.

But I'll ask for advice not to be bored, and continue to work with you. , 5, The gravitational force is caused by mass.

Gravity is a component of gravitational force, which is due to the decomposition of gravitational force into two components when the object rotates with the earth around the central axis of the earth, one provides the centripetal force of the object rotating around the central axis of the earth, and the other is gravity. Of the two forces, gravity is dominant, and the centripetal component is a small amount.

The centripetal component is maximum at the equator and minimum at the poles. That is, the gravitational acceleration is smallest at the equator and maximum at the poles.

In addition, the gravitational acceleration does not point to the center of the Earth's sphere at any point except the equator and the poles, but is slightly angled.

That's all you have to say. 2. Gravitation and gravity are the same force, just by different names.

Force is the interaction between objects, gravitational force and gravity, both are interactions between objects and the earth, are the same thing.

Suppose a balloon is suspended on the surface of the Earth, it is subjected to two forces, one is gravity and the other is the chain of air buoyancy. When these two forces are equal, it is suspended and does not move...2. The gravitational force is the centripetal force, 2, the so-called gravitational force is caused by the mass, and it has nothing to do with whether it is in contact or not.

The condition itself is wrong with what you said, gravitation includes gravity, which exists as long as there is mass, whereas gravity is only limited to objects on earth. To learn physics, it is very important to figure out the concepts. ,2,Only when the force reaches a balance will it be like this It's like turning left to right.,Most of them still go straight.,Haha The grass on the wall is just down Haha,2,