A t0 a grinding wheel has an angular velocity of 210rads , Ask an Expert

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At t=0 a grinding wheel has an angular velocity of 21.0rad/s . It has a constant angular acceleration of 35.0rad/s^2 until a circuit breaker trips at time t = 2.50s . From then on, it turns through an angle 440rad as it coasts to a stop at constant angular acceleration.

(A) Through what total angle did the wheel turn between t=0 and the time it stopped?

(B) At what time did it stop?

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