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A desktop globe of the Earth a hollow sphere with Icm = 2 M R2 is attached to a horizontal spring with one fixed

Question

A desktop globe of the Earth, a hollow sphere with Icm = 2 M R2 is attached to a horizontal spring with one fixed

end. When the spring is stretched slightly from equilibrium, the sphere rolls without slipping across a level tabletop, in simple harmonic motion. What is the angular frequency of the motion?

Science