[填空题]
Pilots can be tested for the wn 45eym1ov6pkby) imnm; 9.sstresses of flying highspeed jets in a whirlingonh cr/v jk4)4 “human centrifuge,” which takes 1.0 min to turn through 20 complete revolutions before k/hnjcr o)4 v4reaching its final speed. (a) What was its angular acceleration (assumed constant), $rev/min^2$ (b) what was its final angular speed in rpm? $rpm$