[填空题]
The tires of a car makxtqcj-:ibu d m93d,h 2/b)ks5 ;p-mpk 3qhqnve 65 revolutions as the car reduces its speed uniformly fro)q /hqp s m5nvk-3pb;km 95km/h to 45km/h The tires have a diameter of 0.80 m. (a) What was the angular acceleration of the tires? $\approx$ $rad/s^2$ (b) If the car continues to decelerate at this rate, how much more time is required for it to stop? s