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A cylindrical habitat in space was proposed by G. K. O'Neill in 1974. If the habitat...

A cylindrical habitat in space was proposed by G. K. O'Neill in 1974. If the habitat was 4 km in diameter and 28 km length would be able to have land, lakes, and multiple cities on the inside surface and clouds along its center. They would all be held in place by the rotation of the cylinder about its long axis.

(a) How fast would the cylinder have to rotate (linear speed at the surface) to imitate the Earth's gravitational field at the walls of the cylinder?


(b)What would be the period of rotation?

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