[填空题]
The blades in a blender rotate a s4xf7(rqle9 fjr xw/5t a rate of 65 (gysi67pc jvn12-q y1vn uej,00 rpm. When the motor is turned off during operation, the blades slow to rest in 3.0 s. Wh1snv,7 2gec(1pjvi y-ynu6jq at is the angular acceleration as the blades slow down? $rad/s^2$