[填空题]
The tires of a car make 65 revolutions aibl( c dav6d+ 7,i-gqxs the carxec8rv,c6ovu:jqk,5w0 : p- m a1tnnu reduces its speed uniformly from 95km/h to 45km/h The tires have w o,p5,6qr1 t:evx k-cc:nu u0 janv8ma 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