[填空题]
The tires of a car make 65 revolk*-jmz(q 3bm ysmcl0 :utions as th9lc 7mwmv k dl(k 4vmt9h+;uzen(7f3te car reduces its speed uniformly from 95km/h to 45km/h The tires have a diameter o3wl tv77mtmk;fm49vn+ d e(lc zhuk 9(f 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