[填空题]
The tires of a car make 65 re.bz1g0jkkne esf.x (3volut6qb .h;vqy1 vcions as the car reduces its speed uniformly from 95km/h to 45km/h The tires have a diametc vqvb;6.h 1yqer 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