[填空题]
The tires of a car mar d)7iksd,v1x ke 65 revolutions as the car reduces its speed uniformly fi 2 ccmfq-ujk2h6z,u3rom 95km/h to 45km/h The tires have a diameter 2 i3zf ku,h2ccq6 jum-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