hi,
I think about Foucault pendulum. it is not force de Coriolis.
The power to move Foucault pendulum is current
from my blog
https://translate.google.co.jp/translat ... edit-text=Foucault's pendulum is said to have proved the rotation of the earth. In 1851 Foucault proved its rotation on experiment. Foucault's pendulum is thought to rotate little by little because the apparent force generated by rotation on the pendulum pendulum and the Coriolis force work.
Coriolis' force is explained by a rotating disk. When the ball on the disk moves, it seems to rotate as seen from the disk. The Coriolis force is thought to work in the direction of the whirlpool formed when a typhoon swirls, water that flows, flows.

From wikipedia
But, it is somewhat strange if you think so. An object on the earth has an inertial force at the speed of its rotation. I do not feel spinning because the surrounding air also rotates with me. The air around the pendulum also receives the inertia of rotation. Does it rotate if a bar with weights on both ends is wired in the center and is hung in parallel? If Coriolis 'force is caused by inertial force, Coriolis' force will work on still objects as well. However, this rod does not rotate.
So, I thought about it in the intracerebral simulator. When I was a child, I imaged the solid in the brain, spun round and playing. I could do things like what I do with the current CG with brain image. I have also found a straight line that divides the cube into three equal parts. Taking the age, the performance of the intracerebral simulator has declined, but still works a little.
Well, before considering Fuuko's pendulum, I was thinking about the typhoon's rotational movement. Typhoons are reversed in direction in the northern hemisphere and the southern hemisphere. Foucault's pendulum also rotates in reverse. Both are thought to determine the direction of rotation by the Coriolis force. But, as I pointed out at the beginning, there is something strange about Coriolis' power.
At that time, it was the Earth's magnetic field that I noticed. The earth's magnetic field has a tilt and a dip angle. It is the gradient of magnetic field lines. In the equator, the almost horizontal dip angle increases as the latitude increases.
Regarding typhoons, I have something to do with pressure, so I will write in another article. We will explain Foucault's pendulum here. At first I thought that the metal ball of the pendulum was affected by the magnetic field. However, an eddy current is generated inside the metallic ball, and although it may become a resistance of the pendulum, a rotating lateral force does not occur. What I noticed there is a long wire hanging metal balls.
Since there are electrons inside the wire traversing the magnetic field, an electric field is generated and electrons move. Current flows. Since the pendulum reciprocates, a current is generated every cycle. Lateral force is applied to the wire through which current flows, but it does not rotate as it is. The magnetic field lines of the earth's magnetic field traversed by the wire have a slope. As the angle between the wire and the magnetic force line increases, the current becomes stronger, so the force on one side (from the equator) works strongly. It rotates.