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Given that maximum fluctuation of energy is 2000 N-m/s and coefficient of fluctuation of speed is 0.02. What is the mean kinetic energy of flywheel?(a) 50 kN-m/s(b) 40 kN-m/s(c) 30 kN-m/s(d) 20 kN-m/sThis question was addressed to me during an interview.Asked question is from Flywheel topic in chapter Internal Combustion Engines of Automobile Engineering

Answer»

Correct answer is (a) 50 kN-m/s

To ELABORATE: The maximum fluctuation of ENERGY in a FLYWHEEL = ΔE, mean kinetic energy of the flywheel = E, and coefficient of fluctuation of SPEED = Cs. ΔE = 2*E*Cs ⇒ 2000 = 2*E*0.02 ⇒ E = 50 kN-m/s.



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