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Question

A stone of mass 4 kg is whirled in a horizontal circle of radius 1 m with angular speed of 2 rev/sec. The moment of inertia of the stone about the axis of rotation is

A
64 kg m2
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B
4 kg m2
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C
16 kg m2
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D
1 kg m2
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Solution

The correct option is B 4 kg m2
Given :
m=4 kg,r=1 m
Moment of inertia about axis of rotation I=mr2=4 kg m2

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