The origin of the tides can be explained by two equivalent considerations:
- The tides are a result of gravity.
The gravitational force decreases with the distance from the gravitational center. Therefore, on the side facing the source of power, it is slightly stronger than on the off-side. This leads to a deformation of the body, which is influenced by the gravity of the other body. In the case of the earth, the deformation is particularly visible at the seas, as water masses are easier to deform than land masses. The moon and the sun in particular affect the earth.
Compared to the force that acts on the center of the earth, there are net resulting forces that point away from the earth.On the side facing the moon/sun, they move towards the moon or sun. Sun. On the opposite side, sin act in opposite directions. Therefore, in the connecting lines Earth-Moon or Earth-Sun Flood Mountains. If the moon earth and the sun are in line, spring floods are to be expected.
of the earth and the sun. The reasoning for both cases is the same, so Here I am limited to the influence of the moon.
In this image, Earth and Moon orbit the common center of gravity.Indeed, it is not the case that the moon orbits the Earth. It is always the case that two bodies orbit the common center of gravity. For the entire solar system, by the way, it is still inside the sun.
In this observation, the gravitational attraction and centrifugal force of the rotation are just balanced in the center of the earth.There is therefore freedom of power. Therefore, the rotation remains stable in good approximation. If the freedom of power were to be exercised, the two celestial bodies would attract and move towards each other. But they don’t. (We don’t see that the moon is slowly moving away from Earth here.) On the two sides of the earth, which are but this freedom of power does not apply. Fly force and gravity do not fully compensate. On the side facing the moon, gravity is greater. On the facing side, the centrifugal force is greater. That’s why the water masses aspire to pause and outward.
The moon also felt the tides of the earth.They are stronger than the tides that the Earth feels. But the moon is made of rock that deforms less than water. But the deformation is there. Incidentally, it has something to do with the fact that the moon’s self-rotation slowly decreased. The deformation leads to a braking effect, because the earth pulls on it with its gravity like on a dumbbell. That’s why the moon today rotates around its own axis just as fast as it needs to circumuon’ tamper with the Earth.
As I said, these two versions are the same.They deal with the phenomenon only from different perspectives.