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How would the kinetic energy of a flywheel ( a spinning disk) change if its rotational inertia was five times smaller but its angular speed was five times larger

Answer :

Answer: This implies that it will be 5 times lesser than it was before

Explanation:

  • From kinetic energy = 1/2Iω²
  • where I = rotational mass
  • and ω = angular speed
  • 1/2 x (5I) x (1/25ω²) = 1/5th of the original kinetic energy
  • This implies that it will be 5 times lesser than it was before.

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