physics
posted by john .
A centrifuge in a medical laboratory rotates at an angular speed of 3800 rev/min. When switched off, it rotates through 46.0 revolutions before coming to rest. Find the constant angular acceleration of the centrifuge. in
1 rad/s2

The average speed while it comes to rest is 1900 rev/min. At that average rate, the centrifuge takes 46/1900 min, which is 14.53 seconds, to stop.
To get the angular deceleration rate, convert 3800 dev/mom to rad/s, and then divide by 14.53 s.