[填空题]
The tires of a car make 65 rehbkig(t .jm s()c5cy t-;3 betzw52xs ik:+c6brof-r5tjy 6avolutions as the car reduces its speed uniformly from 95km/h to 45km/h b-t 56ijyfac+ok: r6rThe 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