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a machine rotor has the following structure: a large solid disk of radius R= 18cm and...

a machine rotor has the following structure: a large solid disk of radius R= 18cm and mass 2.75 kg, with three smaller disks , of radius r= 6cn and mass 1.2 kg each, welded to its surface such that the centers of the small disks are at a distance p=10 cm from the center of the large one. the rotor spins about an axis passing through the center of the large disk. a) calculate the moment of inertia of the rotor. b) what torque is required to accelerate the rotor from rest to 670 rev/min in 2.5s? c) what is the kinetic energy of the rotor at 7500 rev/min?
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