[] 相対性理論はインチキだろう.
175. 2023年1月31日 12:47:40 : GwWAmSLUJI : S1RzVHkyMHdSZlU=[1]
Local Inertial Frame ? (again)　(クリ)

A homogenous disk is rotating vertically. Gravity from below. Therefore, inertial force (centrifugal force) and gravity act on each mass point of the disk. When the rotation speed of the disk exceeds a certain magnitude, a mass point appears where vector of inertial force and gravity are canceled (as total). But it is only natural.It seems to not be note worthy.

Mass point where vector of inertial force and gravity are canceled (as total) also appears in free-falling elevator. Physically, it would be the same phenomenon as a rotating disk.
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