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A disc of radius 2 cm rotating uniformly about a stationary axis with an angular velocity of 10 rad/s is now experiencing an angular retardation of α=0.2t. The magnitude of centripetal acceleration at t=2 s is

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A disc of radius 2 cm rotating uniformly about a stationary axis with an angular velocity of 10 rad/s is now experiencing an angular retardation of α=0.2t. The magnitude of centripetal acceleration at t=2 s is



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