[填空题]
The tires of a car make 65 revolutions as the car 1m2dojooh4pa--r7h -nxl .bareduces its speed unsn1-n y*we- hciformly from 95km/h to 45km/h The tires have a hcw1n -syn-e*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