[填空题]
The tires of a car make 65 revolutions as the car reduces qto jxgm+77h0 t;xh/iits speed unib1q5k -/cuirvformly from 95km/h k/ q- 1vu5brcito 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