At t0 a grinding wheel has an angular velocity of 24.2, Ask an Expert

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At t=0 a grinding wheel has an angular velocity of 24.2 rad/s. It has a constant angular acceleration of 24.2 rad/s^2 until a circuit breaker trips at t = 1.2 seconds. From then on, it turns through 432 rad as it coasts to a stop at constant angular acceleration. At what time did it stop? Give your answer in seconds to the first decimal place.

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