[填空题]
The tires of a car make 65 revolutions 8xzo/ 1*zmv+wul0 hpg6h5v e das the car reducev6 gvo;4 jb06li8 imoxs its speed uniformly from 95km/h to 45km/h The tjiv0 6;m64oboil 8v gxires have a diameter 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