49. A flywheel of moment of inertia A flywheel of moment of inertia 0.32 kg–m2 is rotated steadily 120 rad/s at by a 50 w electric motor. The kinetic energy of the flywheel is (a) 4608 J (b) 1152 J (c) 2304J (d) 6912J Ans. … Read More