[填空题]
The tires of a car ml9t i(j.jaw(v yll3a /ake 65 revolutions as the car re;kcgro,cl u8aym, /d- duces its speed uniformly from 95km/h to 45km/8;m ya/g clcu,,dokr-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