Homework Help: physics

Posted by john on Tuesday, November 15, 2011 at 9:06am.

A large, solid metal sphere is suspended from a the ceiling by a cable, and is free to rotate about the wire. If the mass of the sphere is 176 kg, its radius is 0.7 m, and it is initially rotating at 28 rpm (revolutions per minute), what work is required to increase its rotational speed to 114 rpm

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