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A saw blade has a mass of 0.5 kg and a radius of 10 cm and is rotating at 300 rpm. Once turned off, it takes 5 seconds to slow to a complete stop. What frictional torque acts on the saw blade as its lows to a stop? Suppose friction is the only force acting on the saw blade. (Moment of inertia for a disk: I=1/2MR2)

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