[填空题]
Pilots can be tested for the stresses of flying highspeed ju3o;ql 06f33iwrx zkdets o9jb9bu,y lv3 r+z+p ain a whirling “human centrifuge,” which takes 1.0 min to turn through 20 complete revolutions before r o,yb3 ua9rj++9z lvpbeaching its final speed. (a) What was its angular acceleration (assumed constant), $rev/min^2$ (b) what was its final angular speed in rpm? $rpm$