[填空题]
The tires of a car make qlb u+3h.s2qyewg )-m65 revolutions as the car reduces co59 e v8ix exu0m*u89 qp2g;frb pz;xits speed uniformly from 95km/h to 45km/h The tires p v8qbcz2eump xf5u * x;8i9 xogre09;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