[填空题]
The tires of a car make 65 revolutgmfnbv0y(b5ks0bs/ 9g6r 35dv8 lb w)gkako6 ions jzes:q0(xj3o8 g7hd og 6e:aoas the car reduces its speed uniformly from 95km/h to 45km/h The tires have a j::q87gjes goz3o0 ohda6(e xdiameter 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