[填空题]
The tires of a car make 65 p7 y; tvc)t8srrevolutions as the car (+dyn:. 1yzdd/e1 u) ytfsmqyreduces its speed uniformly from 95km/h to 45km/h The tires have a diamtmz eq yddu (y:/yyd1.1 fsn)+eter 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