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A grinding wheel is in the form of a uniform solid disk of radius 6.95 cm...

A grinding wheel is in the form of a uniform solid disk of radius 6.95 cm and mass 1.91 kg. It starts from rest and accelerates uniformly under the action of the constant torque of 0.591 N · m that the motor exerts on the wheel.

(a) How long does the wheel take to reach its final operating speed of 1 240 rev/min?
s

(b) Through how many revolutions does it turn while accelerating?

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