11. The blades of a blender rotate at a rate of 6300 rpm. When the motor is turned off during operation, the blades slow to rest in 4.0 seconds. What is the angular acceleration as the blades slow down?
Would I have to divide 6300rpm/4.0s? Or would I need to convert RPM into something else before I do anything?

Question

11.	The blades of a blender rotate at a rate of 6300 rpm.  When the motor is turned off during operation, the blades slow to rest in 4.0 seconds.  What is the angular acceleration as the blades slow down? 
Would I have to divide 6300rpm/4.0s? Or would I need to convert RPM into something else before I do anything?

anonymous · Answer

you basically have to convert the angular velocity into SI units. Then you divide the anular velocity with time to get the angular acceleration.