[填空题]
The tires of a car make 65 revolutions as the(z9oi9xg( dregr *ov, car reduces i;yqex 1kn9/fm ts speed uniformly from 95km/h to 45km/h The tires have a diameter of 0.80;q/ 9kxnmfe1y 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