[填空题]
Pilots can be tested for the stresses o+x -h43mxaun yf flying highspeed jetoqj zgwrv+zv7hma,+es7// ;c s in a whirling “human centrifuge,” which takes 1.0 min to turn through 20 complete revolutions before reaching its fhzv/7j/e; s7 ,q wzvcog++m rainal speed. (a) What was its angular acceleration (assumed constant), $rev/min^2$ (b) what was its final angular speed in rpm? $rpm$