[填空题]
The tires of a car mak rzak5: q*ny,oe 65 revolutions as the car reduces its speed uniformly fr5kroy , q*zna:soyy*q7;78qvzm *p p zom 95km/h to 45koq87v*p *7 pyqy szzm;m/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