[填空题]
The blades in a blender rotate at a rate of 650(9tz v 7uoi6vb0 rs tl gx2h4j4nooq 6x2/pm. When the motor is turned off during operation, the blades slow to rest in 3.0 s. What is the angular acceleration as the bl6xjlgo qn /44x2s 2othades slow down? $rad/s^2$