Rotational Motion Question 212

Question: A fly wheel rotating about a fixed axis has a kinetic energy of 360 joule when its angular speed is 30 radian/sec. The moment of inertia of the wheel about the axis of rotation is

Options:

A) 0.6kg/m2

B)0.15kgm2

C) 0.8kgm2

D) 0.75kgm2

Show Answer

Answer:

Correct Answer: C

Solution:

[c]

Er=12Iω2 I=2Erω2=2×36030×30=0.8kgm2



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