a flywheel of gasoline engine is required to give up 300 J of kinetic energy while its angular velocity decreases from 600 rev/min to 540 rev/min. What moment of inertia is required?

Dear cathy

E  =1/2 Iw₁²  - 1/2 Iw₂²

  =I/2 [w₁²  - w₂²]

300 = I/2 [ w₁²  - w₂²]

w1 = 2*∏*600 /60 = 20∏ rad/sec

w2 = 2*∏*540 /60 = 18∏ rad/sec

put the value of w1 and w2 and calculate the value of moment of Inertia

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