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Questions  

An sphere of moment of inertia 4 kg/m passing through the diameter. It is  suspended from a steel wire of negligible mass, whose couple per unit twist is 81  Nm/rad. It is allowed to execute small angular oscillations. The angular frequency  of oscillation is

a
92rad/s
b
94rad/s
c
92πrad/s
d
94πrad/s

detailed solution

Correct option is A

For torsional pendulum, T=2πIc Hence angular frequency of oscillation is ω=cIω=814ω=92ω=4.5rad/s

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