[填空题]
The tires of a car make 85 revolutions as the car reduces its speed ovs:- yut8 )jpuniformly f4wb,e5yha ib p,b*0gvrom 90kih,0p g,bb*ye4bvwa 5m/h to 60km/h The tires have a diameter of 0.90 m. (a) What was the angular acceleration of each tire? $\approx$ $rad/s^2$(round to two decimal place) (b) If the car continues to decelerate at this rate, how much more time is required for it to stop? s