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Calculate the moment of inertia of the flywheel of mass 45 kg and radius of 2 m.(a) 185 kg-m^2(b) 180 kg-m^2(c) 175 kg-m^2(d) 170 kg-m^2This question was posed to me in an interview.My question comes from Motors Rating and Heating in chapter Rating and Heating of Motors of Electric Drives

Answer»

Correct CHOICE is (B) 180 kg-m^2

Easiest explanation: The moment of INERTIA of the flywheel can be calculated using the FORMULA I=M(R^2). The mass of flywheel and radius is given. I=(45)×(2)^2=180 kg-m^2. It depends upon the orientation of the rotational axis.



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