[填空题]
The tires of a car make 65 reim ;ffb 5+-ga5 -uqqmevolutions as the car reduces its spee-v68.ui xyr zcd uniformly from 95km/h to 45km/h The t y.8i6 vux-zcrires 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