At time t=0 a grinding wheel has an angular velocity of 23.0 rad/s . It has a constant angular acceleration of 26.0 rad/s² until a circuit breaker trips at time t = 1.60 s. From then on, the wheel turns through an angle of 436 rad as it coasts to a stop at constant angular deceleration.
a) Through what total angle did the wheel turn between t= 0 and the time it stopped? answer in rad
b) At what time does the wheel stop? (secs)
c) What was the wheel's angular acceleration as it slowed down?
Express your answer in radians per second per second.