Foreword:
Do you know? If I jump high enough, I'll be thrown out of the earth";
If I sleep on *** for 12 hours, will I wake up from the other side? ”
Twenty years ago, these strange questions would have been labeled as "brainstormy", but now some scientific explanations can be found.
Back 20 years ago, the answer to these questions was probably "of course not".
Nowadays, we often see similar discussions on the Internet, so the question is, has the earth changed in the past 20 years, or has our perception changed?
Why do these phenomena that were once impossible now have a reasonable explanation?
Next, let's have a ** after all.
1. Why is the Earth's rotation thrown out?
It takes 24 hours for the Earth to rotate in one circle, that is, the time of a day, and in addition to giving us the alternation of day and night, it also brings some interesting conjectures.
Everyone has found that when the earth rotates, objects or humans also move on the surface of the earth, but in fact, the rotation speed of the earth is still very fast, and objects near the equator can move 465 meters in one second, so why can we still jump easily on such a high-speed earth?
This involves a concept called "relative motion".
The speed of the earth's rotation is fixed, but when we jump, we also move with the earth, so for us, the earth seems to be stationary, and it has no effect on our motion.
So why can't we be thrown out of the earth when we jump high enough?
This is explained in terms of the structure of our bodies.
The human body is affected by gravity, and when we jump, gravity pulls us back to the ground, so we can't be thrown out of the earth, but are firmly attracted to the earth by "gravity".
In addition, everything on the earth is also constrained by the ground and attracted by the gravitational pull on the earth, so it is impossible to be thrown out by the earth.
So no matter how fast the earth rotates, we won't be thrown out.
So why aren't we thrown out of the Earth's rotation so fast all the time?
This is explained by the shape of the earth and the gravitational pull of the earth itself.
The shape of the earth is similar to an ellipsoid, and in the process of rotation, it will rotate its own gravitational force with it, and the rotation of this gravitational force will firmly attract us to the ground and will not be thrown out.
Therefore, the rotation of the earth will not throw us out, this is just a conjecture that seems to be scientific but is not possible.
It is worth mentioning that the speed of the Earth's rotation does not slow down, because its rotation speed is closely related to gravity.
2. After hovering for 12 hours, will it go to the other side of the world?
The rotation of the earth brings us the alternation of day and night, and the hovering time of *** gives us a peculiar idea - "If *** hovers in the air for 12 hours, will it hover from one side of the earth to the other?" ”
This question seems simple, but in fact, there is a lot of physics knowledge involved.
To explain this problem, it is first necessary to understand how the rotation of the Earth affects its surface velocity.
The speed of rotation of the Earth does not change, it rotates the fastest near the equator, 465 meters per second, and in the region close to the poles, the rotation speed slows down, which is like a spinning top, and the speed in the center is much faster than the speed at the edges.
According to the rotation of the earth, 12 hours is enough time for it to complete half of its rotation, so according to this idea, if you hover in the air for 12 hours, will it hover from one side of the earth to the other?
This may seem reasonable, but it's actually not possible.
Although the Earth's rotation speed is fast, its gravitational pull firmly attracts everything to the ground and will not be thrown out easily.
And even such a flying machine will be affected by the gravitational pull and air resistance of the earth while flying.
So even if it hovers in the air, it will still move with the Earth, and it will not move from one side to the other after hovering for 12 hours.
For the rotation of the earth, the best way to minimize its impact is to leave the range of the earth's rotation, which is like we are playing a game, only when we leave the scope of the game, the guidance of the game will not affect us.
On Earth, we can't get away from its gravitational pull, but we can use other means to reduce its impact, like if we run on the ground, the speed is very limited, but if we get into a car, the speed will be much faster.
Therefore, for ***, its hovering time will not be affected by the rotation of the earth, it can hover for up to 24 hours, and it can also adjust the hovering position and height according to its own needs, providing us with better services.
The author believes that the physical phenomena and natural laws on the earth are both magical and wonderful, and we can explain these phenomena in various ways, but we cannot change their essence.
It is these phenomena and laws that make the earth a fascinating planet.