[填空题]
The blades in a blender r4 apq- uv0zlhj -atgif:. 6m7imy9ro 1otatzis7 a. w(n6bre at a rate of 6500 rpm. When the motor is turned off during operation, the blades slow to rest in 3.0 s. What is the angular acceleration as the blades slow dow i6(zb .srawn7n? $rad/s^2$