At time t 0 a grinding wheel has an angular velocity of, Physics

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At time t 0 a grinding wheel has an angular velocity of

At time t = 0 a grinding wheel has an angular velocity of 23.0 rad/s. It has a constant angular acceleration of 27.0 rad/s²until a circuit breaker trips at time t = 1.60 second. From then on, the wheel turns through an angle of 440 rad as it coasts to a stop at constant angular deceleration.

Part A) Determine at what time does the wheel stop?

Part B) Determine the wheel angular acceleration as it slowed down?

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