[填空题]
The tires of a car mj e6u9 5kx(iv;vsc4u/( dmb*nbrc9v kake 65 revolutions as the car re8z,2f i y (vwvkbp54djduces its speed uniformly from 95km/h to 45km/h The tires have a diameter of 0jpi( 8w5zkfy,v24bd v.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