The radius of gyration of a uniform rod of length l, about an axis passing through a point 14 away from the centre of the rod, and perpendicular to it, is
A
18l
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B
√38l
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C
√748l
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D
14l
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Solution
The correct option is C√748l As we know that moment of inertia of the rod about its centre of mas,
Icm=Ml212
Using parallel axis theorem, Moment of inertia of the rod about an axis passing through a point 14 away from centre of the rod,