[填空题]
Pilots can be testedi(5; 3oej,a p-rpj czq forwgo: g8 d4p8sdchw4 *a the stresses of flying highspeed jets in a whirling “human centrifuge,” which takes 1g4g swwch8 p4d:a*o d8.0 min to turn 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? $rpm$