[填空题]
The tires of a car m19vpgce 2 f8i( ez1xvdakjn 0h *t(jvrs7v:k(dc e 65 revolutions as the car reduces its speed uniformly from 95km/h to 45km/h The tires have j(chrj0:sdt7(vn vk *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