[填空题]
The tires of a car make 85 revolutions as the car reducpg*si)/mot v5esp 2+k6kk qbsdu0j-c6v its speed uniformly from 90km/h to 60km/h The tires have a diameter of 0.90 m. (a) What was the angular asj+ku -62vdk p6bqkc 0cceleration 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