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Q6) A conical friction clutch has a semi-apex angle of 45^o and transmits torque at an effective diameter of 75 mm. The axial thrust applied to the clutch is 400 N and the coefficient of friction between contact surfaces is 0.4. The clutch connects an electric motor running at 1512 rpm to a flywheel of mass 20 kg with an 85 mm radius of gyration.

Calculate EACH of the following:

(a) The time taken for the flywheel to reach maximum speed from rest with a transmission efficiency of 75 %; (14)

(b) The angular impulse transmitted to the flywheel during acceleration. (2)