[填空题]
The blades in a blender rotate at a rate of 6500 yq d5o u5+v8z z.lbp/lwi)ih (rpm.gebenv;z8x a 70 rh3.gbn c/u+ When the motor is turned off during operation, the blades slow to rest in 3.0 s. What is tu+rv7bn.x 8 e/;ngz hec 3abg0he angular acceleration as the blades slow down? $rad/s^2$
