Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 58 rad/s. the wheel is run at that angular velocity for 30 s and then power is shut off. the wheel slows down uniformly at 1.4 rad/s2 until the wheel stops. in this situation, the total number of revolutions made by the wheel is closest to: