[填空题]
Pilots can be tested for the stresses of flying hig ,b3iz(e4 sopsiib+v ;hspeed jets in a whirl6u,q:. gmktx qing “human centrifuge,” which takes 1.0 min to tur,.g : qmu6xqktn through 20 complete revolutions before reaching its final speed. (a) What was its angular acceleration (assumed constant), $rev/min^2$ (b) what was its final angular speed in rpm? $rpm$