[填空题]
The tires of a car make 65 revolutions as th j8k 5uoh(t o9oy.1hbv 1hoen3e car reduces its speed uni;3bq:gyij kj+ formly from 95km/h to 45q:g bkji+ jy3;km/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