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A wheel is at rest. Its angular velocity...

A wheel is at rest. Its angular velocity increases uniformly and becomes 80 radian per second after 5 second. The total angular displacement is :-

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Angular acceleration `alpha=(omega_2-omega_1)/t=(60-0)/5=(12rad)/sec^2` Now from `theta=omega_1t+1/2alphat^2=0+1/2(12)(5)^2=150rad`.
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