[填空题]
The tires of a car me g)ug6.ras e.:zgt kc1nak/h kn); *cake 65 revolutions as the car reduces its speed uniformly from 95km/hckacgk):n* 1n;k h/zt to 45km/h The tires have 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