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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 

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