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A disk with a c value of 1/2, a mass of 10 kg, and radius of...

A disk with a c value of 1/2, a mass of 10 kg, and radius of 0.48 meters, rolls without slipping down an incline with has a length of 5 meters and angle of 30 degrees. At the top of the incline the disk is spinning at 31 rad/s. What is the rotational kinetic energy of the disk at the bottom of the incline in Joules?
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