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Question

A turbine fan in a jet engine has moment of inertia 2.5kg m2 about its axis of rotation. Its angular velocity is 40t2. Find the net torque at any instant.

A
100t
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B
100t2
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C
200t
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D
200t2
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Solution

The correct option is C 200t
τ=dLdt=ddt(Iω)=ddt(2.5×40t2)
τ=200t

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