[填空题]
The tires of a car ma6g.k/ u:de3d+kbako k0y j mz;ke 65 revolutions j vn0fjyzd59ha)nis 9v8e4* k as the car reduces its speed uniformly fr s d k0e 9ajnvv9z4j5*n8)fiyhom 95km/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