Everyone should understand that exercise is relative. That is, there is no absolute movement. So what is relative to ? When two people run at the same speed, then the two people can be regarded as relatively stationary, . This is what we call relative motion.
Why don’t humans on earth feel that the earth is rotating at supersonic speed? It is also because of this reason that humans are constantly rotating with the earth, so humans are said to be stationary relative to the earth, and the earth is stationary relative to humans, and they cannot feel the rotation, so the two are relatively opposite. Stationary, that is, humans cannot feel the earth moving.
In fact, there are many such examples in life. For example, when we are riding the high-speed train, we do not feel that the high-speed train is moving at super fast speed. Of course, this premise is that when we do not look at the stationary objects outside the window, it is precisely because of the high-speed train. The speed of the train is the same as that of humans, so the two are relatively stationary, so humans cannot feel that the high-speed train is running.
Then someone will say, when I jump up, I am not in contact with the earth, so can I feel the rotation of the earth? In fact, this is also wrong. When you jump up, because the inertial force and still have the original speed, which is the same speed as the earth's rotation, it is said that the earth is still relatively stationary at this moment. Therefore, humans living on the earth cannot feel the rotation of the earth because the earth is relatively stationary.
Human vision observes the movement of objects based on reference objects. That is to say, when there is a reference object, humans can feel that the object is moving. If there is no reference object, they cannot feel that the object is moving. For example, when there is no reference object in the sky, humans cannot feel the movement of the aircraft, and can only rely on a speedometer to measure the flight speed of the aircraft.
Since all objects on the earth rotate with the earth, humans cannot feel the rotation of the earth because all objects around them are relatively stationary. Therefore, since there is no reference object that does not rotate with the earth, humans cannot feel that the earth is rotating.
Because the earth is very huge compared to humans, humans cannot feel the rotation of the earth. Because even if the earth rotates once, humans can only feel an angular change of less than 1%, not even an angular change of one ten thousandth. This is because of the insignificance of human beings, so in the past humans would think that the earth was flat,
but humans could not feel that the earth was rotating rapidly? In fact, humans cannot feel the rotation of the earth, but they can feel the revolution of the earth. Because the earth is constantly rotating and revolving around the sun, it is said that there are changes in the four seasons throughout the year.
When the earth rotates closer to the sun, then it is summer. If the earth rotates farther away from the sun, it is winter. It is precisely the continuous rotation and revolution of the earth that provides humans with a different living environment.
