[填空题]
The tires of a car make t14iins -9xd f65 revolutions as d;fm.9u* cgy(c bg:nathe car reduces its speed uniformly from 95km/h to 45km/h The tires ha;dm* :9.yubgcf c(agnve 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