[填空题]
The blades in a blender rotate a 8 *shlmb 27.zdy6legyt (a/g 6c dmogu )cmdk1dx3b6+ va rate of 6500 rpm. When the motor is turned off during operation, the blades slow to rest in 3.0 s. Wha3ovd/b+a mugk1 6x)6g ccdd(mt is the angular acceleration as the blades slow down? $rad/s^2$