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flywheel fluctuation of energy

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  1. A flywheel of moment of inertia 9.8 kg m2 fluctuates by 30 rpm for a fluctuation in energy of 1936 Jouls. The mean speed of the flywheel is (in rpm)                                                                                                    

      (a) 600                                                                (b) 900

      (c) 968                                                                (d) 29470

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