[填空题]
The tires of a car make 65zkv/c,*+ s md *dykmhh6de*+x revolutixa; cw7yz/n3 w+kpht/ ons as the car reduces its speed uniformly from 95km/h to 45km/h The tires have a diameter ;wktp /xnch/zy 7 wa+3of 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