The blades in a blender rotate at a rate of 6500 rpm. When the motor is turned off during operation, the blades slow to rest in 2.6 s.

Question

1. What is the angular acceleration as the blades slow down?

Answer 1

The rpm first needs to be converted to rad/s, by multiplying by 2 pi/60

The angular deceleration rate is
[6500*(2 pi)/60]/2.6 rad/s^2

Answer 2

223.884

Answer 3

Answer should be negative