The Shell Theory tells us that inside a homogeneous sphere there is no gravity. It seems to me that if you cut off the top and bottom of the sphere and leave a ring, equal in width from the equator of the sphere, that it, too, would have zero gravity within the ring along the plane of the original equator.

  • Please ignore the instability of the ring when rotating around a central mass such as a star or planet. Assume the ring has no substantial masses near it.

  • For the purpose of this question, the ring is not spinning, so there is no centripetal force.

Question:  In this instance, would a person standing on the inside of the ring, or at any point within the volume of space defined by the circumference and width of the ring, experience a gravitational effect due to the ring?


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