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Calculate the moment of inertia of the solid sphere having a mass of 28 kg and diameter of 15 cm.(a) 0.01575 kgm^2(b) 0.01875 kgm^2(c) 0.01787 kgm^2(d) 0.01568 kgm^2I had been asked this question by my college director while I was bunking the class.This interesting question is from DC Motors in division Characteristics of DC & AC Motors of Electric Drives |
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Answer» CORRECT answer is (a) 0.01575 kgm^2 The explanation: The moment of inertia of the solid sphere can be calculated using the FORMULA I=2×miri^2÷5. The mass of the solid sphere and DIAMETER is GIVEN. I =(28)×.4×(.0375)^2=.01575 kgm^2. It DEPENDS upon the orientation of the rotational axis. |
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