A rotating flywheel has moment of inertia 12.0 kg ~ m2 for anaxis along the axle about which the wheel is rotating. Initially the flywheelhas 30.0 J of kinetic energy. It is slowing down with an angularacceleration of magnitude 0.500 rev/s2. How long does it take for therotational kineticenergy to become half its initial value, so it is 15.0 J?

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