A wheel whose moment of inertia is 2kgm2 has an initial angular velocity of 50 rads−1 A constant torque of 10 N m acts on the wheel. The time in which the wheel is accelerated to 80 rads−1 is
A
12 s
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B
3 s
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C
6 s
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D
9 s
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Solution
The correct option is A 12 s T=I(ω2−ω1c)=210(30) =6sec