[填空题]
The tires of a car m ogsuj*+vu r8:ake 65 revolutions as the car redk e 8zip5)2aqvuces its speed uniformly from 95km/h to 45kmi5pq8e )va2 kz/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