[填空题]
The tires of a car make 65 revolutions as the cavlwa96tjn nep 8wn( +u99g.x jr reduces its spelcbrz )k 2.1dved uniformly from 95km/h to 45km/h The tires have l)kr d.b1 zvc2a 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