[填空题]
The tires of a car make 65 revolutions as the car reduyqr,(2) lwe dvce6p0tevcqv79, .s yyy ys its speed uniformly from 95km/h to 45km/h The tires y7c0.vve 69yty, ys pqhave 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