[填空题]
The tires of a car make 65 revolutions as*;p:rxr rw 0roa mdjb5*w 1l+c the car reduces its speed uniforv;2 0rj tjw,6atjm:ubmly from 95km/h to 45km/h The tires have a diameter ow, : jamu 0rvtbj6jt;2f 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