A disc of moment of inertia `3 kg m^(2)` is acted upon by a constant torque of 60 Nm, if the disc is at rest, then the time after which the angular velocity of the disc is 90 rad/s, will be
A. 1.5 s
B. 3 s
C. 4.5 s
D. 6 s

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1 Answers

Correct Answer - C
`tau = I alpha =(I(omega_(2)-omega_(1)))/(t)`

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