Consider two fly wheels labeled A and B both of which are spinning with the same angular velocity. Each flywheel consists of two small heavy spheres connected by very light rods to a light axis. Flywheel A has spheres of mass 2m, each a distance R from the axis. Flywheel B has spheres of mass m, each a distance 2R from the axis. Which flywheel has more rotational kinetic energy?
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