Sunday, March 7, 2021, 00:50
There are many simple toys that make it possible to explain very complex effects or phenomena. One of them is turning, a very old and popular toy in the villages of the 1950s. The physics behind it makes it possible to explain current instruments, for example the Gyroscopo or the movements of the planets.
While the spider, vertical or sloping, is launched, two movements are obtained: the sleeping spider or the spider that describes a circumference in addition to switching on itself, as if it is the earth around the sun. In the sleeping spider, the rotation axis is perpendicular to the plane (soil) on which it dances. If the turning is perfectly symmetrical, the center of gravity must be at an inner point where the virtual rotation axis passes. But because turning, due to mass or construction, is not completely symmetrical, because it loses speed, the rotation axis leans and starts to rotate to describe a cone, the corner point of which is the tip of the spider. That is why the top of the spider describes a circumference. This new movement, called precession, is related to the power of gravity. When the turning is perfectly vertical, the center of gravity is in its rotation axis and gravity goes to the ground in the direction of the axle through the point of support. But when the rotation axle, the direction of the gravity reference remains vertical, but no longer reaches the ground that coincides with the tip of the spider. This relocation generates is what a moment of strength is called and produces the precession movement.
The earth revolves around the sun that describes an ellipse (ecliptic). The rotation axis is not perpendicular to the plane that contains the ecliptic. That is why the Ecliptic passes the plane of Ecuador twice a year; Spring and autumn, the so -designed equinoxes. Moreover, the earth is not a perfect atmosphere. For both effects, the attraction of the sun is not uniform and produces a moment in force so that the rotation axis of the earth describes a precession movement that is comparable to that of the hull. But in this case the center of the cone is the center of the earth and the turn is completed once every 25,868 years. That is why Ecuador’s level in relation to the plane of ecliptic. This does not fix the equinoxes. Because of this movement, the heavenly pole changes over time. Now it is the Polar Star, but if it stops being our pole, it will not take up to 25,868 years. On the precession movement they overlap, because of the attraction of the moon, small loops (utility) that do not make the precessional relief a smooth line, but wavy. The earth describes a complete loop every 18.6 years, which is why the Tterra carries out 1300 utensils during the precession.
Regarding the usefulness, it also appears in the spider. In conclusion, the two movements in the bodies appear in rotation and are the basis of the giroscope.
