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Physics 10 Online
OpenStudy (anonymous):

A hollow sphere of radius 0.25 m is rotating at 13 rad/s about an axis that passes through its center. The mass of the sphere is 3.8kg. Assuming a constant net toque is applied, how much work is required to bring the sphere to a stop?

OpenStudy (anonymous):

Work is energy. You need to remove the rotational kinetic energy of the sphere - work out what this is and you are home.

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