[填空题]
The blades in a blender rotate at a ral ri :f1my s1w:)ie:dste*eps- f: 0yvau of 6500 rpm. When the motor is turned off during operation, the blades slow to rest in 3.0 s. What is the angular acceler:-*y0 faues vpation as the blades slow down? $rad/s^2$