How much rotational kinetic energy in joules is there in a disk  of radius 0.2 meters and mass 76 kg rotating at 1000 turns per second?  Give your answer in joules.

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Chapter10: Fixed-axis Rotation
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Problem 56P: Calculate the rotational kinetic energy of a 12-kg motorcycle wheel if its angular velocity is 120...
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How much rotational kinetic energy in joules is there in a disk  of radius 0.2 meters and mass 76 kg rotating at 1000 turns per second?  Give your answer in joules. 

Expert Solution
Step 1

Given,

   r = 0.2 m

  m = 76 kg

 turns = 1000/s

         = 1000×3600×π180 = 6285.713 rad/s

 

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