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a. Determine the applied torque required to accelerate a rotor of mass 100 kg and radius of gyration 500 mm from a speed of 50–300 rpm in a time of 12 s. Neglect bearing friction.
b. A flywheel of mass 50 kg and radius of gyration 175 mm is accelerated from rest to a speed of 500 rpm in 10 s. There is a bearing friction torque of 2 Nm. Determine (a) the angular acceleration, (b) the applied torque.

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