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GATE ME 2013 | Question: 31

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A flywheel connected to a punching machine has to supply energy of $400 Nm$ while running at a mean angular speed of $20 rad/s$. If the total fluctuation of speed is not to exceed $±2%$, the mass moment of inertia of the flywheel in $kg$-$m^2$ is

  1. $25$
  2. $50$
  3. $100$
  4. $125$

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