[填空题]
The tires of a car make +1epe )wgrpi( 65 re2x .ng8n fot+uvolutions as the car reduces its speed uniformly from 95km/h to 45km/h The tires have a diameter of 0.2nfg utx+ n8.o80 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