Preamble:
Have you heard? If I leap to a high place, I will be tossed up by the earth.
If you sleep on a plane for 12 hours, will you wake up from there? ”
Twenty years ago, this kind of strange problem would have been labeled as "big brain", but now, he can find reasonable reasons in some aspects.
Twenty years ago, everyone would have said, "Absolutely not." ”
But now, similar topics often appear on the Internet, in the past 20 years, has the earth changed, or has our views changed?
Why do things that were incomprehensible now make sense?
Let's take a look.
1. How was the Earth thrown away?
Since the Earth rotates once every 24 hours, i.e. a day, this discovery not only provides us with a day and night cycle, but also provides us with many interesting speculations.
We all know that as the Earth rotates, things around it move with the Earth's rotation, but in reality, the Earth still rotates very fast, and something close to the equator can travel at a speed of 465 kilometers per second, so how can we still jump so easily in such a fast motion?
There's a concept of "relative motion" here.
Although the rate of rotation of the Earth is constant, when we jump, we move the whole planet with it, making us look as if we are standing still and have no effect on our movement.
Why, then, can't we be tossed up by the Earth after we have jumped to a certain height?
This is explained in terms of the structure of the human body.
The human body has a gravitational pull, and when jumping, the gravitational pull pushes us backwards, therefore, we are not thrown to the earth by "gravity", on the contrary, we are glued tightly to the ground.
Moreover, everything on this planet will be bound by the earth, pulled by the power of the center of the earth, and cannot be thrown out at all.
Therefore, no matter how fast the Earth rotates, we will not be thrown.
Since the Earth is rotating at such a high rate, why haven't we been thrown?
This is thanks to its shape and its own gravitational pull.
Because the Earth itself is elliptical, when it rotates, it brings its own gravity with us, allowing us to cling to the ground without being thrown away.
It's simply not possible.
You know, in this process, the rotation of the earth does not slow down, which is closely related to gravity.
2. **Stay in the air for 12 hours, is it possible to reach the opposite side?
Because of the rotation of the earth, the change of day and night, and when the plane hovered, we had a strange thought: If a helicopter circled in the sky for 12 hours, could it fly from one end to the next? 」
Although this question may seem easy, there is a lot to cover.
To illustrate this, we need to understand how the Earth's rotation affects the rate of its surface.
And near the North Pole, its speed will gradually decrease, like a high-speed spinning top, its ** area of the rotation speed is much higher than the outer area.
At the current rate, twelve hours is enough for the plane to make a circle around the sun, and if so, would 12 hours of hovering in the sky make the plane fly from one end to the next?
This is a question that sounds reasonable, but in practice it is not feasible.
Although the earth rotates very quickly, its gravity still holds everything to the ground tightly and is not easily thrown away.
What's more, even a helicopter has to withstand gravity and air currents in the air.
As a result, even if suspended in mid-air, it will move with the movement of the Earth, rather than moving from one side to the other after 12 hours, as was the case before.
The best way to minimize this effect is to stay away from the rotation of the planet, it's like a game, as long as you get out of this area, you won't be disturbed in any way.
On Earth, we can't get rid of gravity, but we can reduce the effect of gravity in other ways, for example, if you run on the ground, your speed will be limited, but when you ride a bike, your speed will increase dramatically.
That's why, when the helicopter hangs in the air, it is not limited by the rotation of the earth, hovering for a maximum of 24 hours, and can also hover freely according to its own requirements.
The author believes that the matter and natural laws in nature are mysterious and wonderful, and people can interpret them in different ways without changing their own nature.
That's it, this world is so fascinating.