The crank of a slider-crank punching press has a mass moment of inertia of 1 kgm2. The above figure shows the torque demand per revolution for a punching operation. If the speed of the crank is found to drop from 30 rad/s to 20 rad/s during punching what is the maximum torque demand during the punching operation?
(a) 94.4 Nm (b) 104.7 Nm
(c) 477.2 Nm (d) 523.8 Nm