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A ball rests on the top of an incline where it has an initial gravitational potential energy of 100 J. It begins to roll down

A ball rests on the top of an incline where it has an initial gravitational potential energy of 100 J. It begins to roll down the incline. At the bottom of the incline, the ball has a translational kinetic energy of 40 J. How much rotational kinetic energy does the ball have at the bottom of the incline?

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