[填空题]
The tires of a car make 65 r hyvj2-m)gd m i5j0x:levolags*gim8(i 7futions as the car reduces its speed uniformly from 95km/h to 45km/h The tires have a(7igf*i a msg8 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