Posted by javane on .
A propeller slows from 490 rev/min to 177 rev/min in 3.50 s. What is its angular acceleration?
 physics  Writeacher,

physics 
drwls,
Divide the angular velocity change in RADIANS/SEC (not rpm) by the time interval required (3.20 s). The answer should be negative, with dimensions of radans/s^2

physics 
javane,
thnak you i have the equation studied now