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Theory of Machines
Governors & Flywheels
GATE 2007
Medium

The speed of an engine varies from 210 rad/s to 190 rad/s. During a cycle the change in kinetic energy is found to be 400 N·m. The inertia of the flywheel in kg·m² is

  • 0.10
  • B0.20
  • C0.30
  • D0.40

Explanation

ΔE=I·ωmean·Δω. ωmean=(210+190)/2=200 rad/s, Δω=210−190=20 rad/s. I=400/(200×20)=0.1 kg·m².

Source: GATE ME 2007 (2007)

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