[填空题]
The tires of a car make 65 revolutions ad-;4tq:bd ev fs the car rcm 0omjz 1:: h(l f.yi5lcb p *i4dvf-/qs7bqqeduces its speed uniformly from 95km/h to 45km/h The tires have a diameterlyql7fmb m-bh z1 4. d*jo5 :qcci f/(:v0isqp 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