[填空题]
The tires of a car make 65 revolutions as the car reducc uww p* m/vr1407shdtes d ;bfi5;qew-i1lg9 vuits speed uniformly from 95kd 5f;-w;b1ql ie 9uivgm/h to 45km/h The tires 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