[填空题]
The tires of a car make 65 rev+-wt 9pjjbe6z olutions as the car reduces its speed uniforfh .ncsq 1mzfyyv6420swgf,*g7v/ i smly from 95km/h to 45km/h The tires have a diameter of 6yfys cwsfgs, 70.2 v*fgvzq n 4hmi/10.80 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