I haven t figured out why people on the other side of the globe don t fall

10 years old, promising.

The previous explanations are all correct, but I don't know if it will be too abstract for you......I'll just say it again as our teacher taught us.

First of all, I will tell you about the law discovered by a great scientist named Newton: the law of universal gravitation.

What is gravitational force? That is, there is a force of mutual attraction between everything (of course, this thing and thing refer to the concrete).

Let's say you have an apple in your hand and you let go, and the apple falls to the ground. Not because he wants to move downward, but because he is attracted by the gravitational pull of an earth, and the earth is like a magnet that sucks objects from all directions into itself like nails, so even if you are "underneath" the earth, you will be attracted by the earth and you will not be able to fall off.

And because the earth is so big! Everyone can't see the person on the other side, and they all feel that the one on their head is "above", and the place where they fall is "below", so over time there is a saying that "the head is on top and the feet are down".

First, the gravitational pull is towards the center of the earth.

Second, the gravitational force in the universe is less than the gravitational force

Gravity, a person at any end of the earth will be subjected to a force pointing towards the center of the earth, that is, it will make anyone feel that their head is up and their feet are down.

Imagine you're in space, and you don't have any force, and you don't have an intuitive sense of going up and down, and of course you can say that your head is on top and your feet are down, because you've already formed this concept in your brain.

There is gravity, so you are attracted to the center of the earth, and your center of gravity is towards the center of the earth, that is, your feet are always towards the center of the globe, and the earth is like this for a week, so no one can fall down.

Yes, let's take an apple. For example, an apple floats freely in the air (without any effect), but the apple does not have the concept of up and down, left and right, there is only one apple in the air, and it can rotate freely. We are apple peels.

Children, there are two paths.

1. Check the relevant information;

2. Find a good physics teacher and ask well!

Don't pretend to understand.

Why don't you want to think about how you won't fall.

You have the potential of Newton's second ... He wondered why the apple didn't fall into the sky.

Human beings live on the surface of the earth and do not fall because of gravity; The internal structure of the earth from the outside to the inside is: crust-mantle-outer core (core).

1. The earth itself has a considerable mass, so it will also show gravitational attraction to any object around the earth.

According to Newton's law of gravitation, there is a gravitational force between any two substances that have mass. No matter where we are on Earth, the equator or the poles, we are subject to gravity.

2. The interior of the earth is divided into three concentric spheres: the core, the mantle and the crust. The central layer is the core; In the middle is the mantle; The outer layer is the earth's crust.

The crust and mantle are bounded by the Moho plane, and the mantle and core are bounded by the Gutenberg plane.

When we learned that the earth is round, some children asked curiously, "Will people standing on the earth be headed down in some places, heads up in some places, left in some places, and right in some places?" Why can't a person with his head down fall again?

The earth is round, but no matter where people stand on it, they have their feet on the earth and the sky above their heads.

The reason why people can't fall off when they stand on the earth is that the center of the earth is called the center of the earth, and the center of the earth is in the middle of the earth, and the center of the earth is like a very large magnet, which has a great attraction, and attracts everything on the earth to the center of the earth.

When a child throws the ball upwards, it will naturally fall to the ground. When apples are ripe, they fall from the trees to the ground instead of to the sky. What is the reason for this, children? Yes, it's because the center of the earth is attractive, and it sucks them to the ground.

Because for the earth, the surface of the sun is actually like the "ground", and the sun exerts a strong gravitational pull on the earth, always pulling the earth to the surface of the sun.

However, the Earth moves in an approximate circular motion around the Sun at a certain speed, and the centrifugal effect produced in the process can counter the Sun's gravitational pull and thus avoid falling on the Sun's surface. In this way, the earth seems to be "suspended" in the universe. In the same way, the orbit of the satellite and the moon around the earth at a certain speed can also avoid being dragged to the ground by the gravitational pull of the earth.

In addition, the solar system also moves around the center of the Milky Way to avoid falling into the galactic center, and the earth is not "floating in the universe, it is just an illusion that is invisible and intangible due to the effect of gravity." When we are in the sun, we are looking at all the planets with the sun (or the earth) as a moving point, and we will have a sense of why these planets revolve around the sun instead of falling into the sun.

Like the illusion of floating in the sky, in fact, for the planets, the gravitational pull of the sun (almost) provides the centripetal force completely, so the planets can always spontaneously and continuously revolve around the sun, just like someone holding a rope and throwing a small ball, as long as the traction force is still there, then the planet can always rotate around the center, and when we replace the traction provided by this rope with the gravitational pull of the sun, the planet looks like it is suspended in the universe.