[填空题]
The tires of a car make 65 rvi 2h, 2xi ny ixock)ob*f9b 2s8lgg2.e/v5, ep9fu gzv+;nrazvolutions as the car reduces its speed uniformly from 95km/h to 4fr5+n;vpzu9 ea zv g,/5km/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