[填空题]
The tires of a car make v0r yi42 +jaduwg n9/uz2k*ec65 rc3;gz q q(y+fcevolutions as the car reduces its speed uniformly from 95km/hq3z+ (gfcqy; c to 45km/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