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You need to design an industrial turntable that is 50.5 cm in diameter and has a kinetic energy of 0.205 J when turning at 42.0 rpm (rev/min).
(a) What must be the moment of inertia of the turntable about the rotation axis?
kg · m2
(b) If your workshop makes this turntable in the shape of a uniform solid disk, what must be its mass?
kg
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