[填空题]
Pilots can be tested for the stresses of flying highspeed jets xpwmmmc:m4*9y- hj3 h znzm-8in a whirli7rko getm. *x)ng “human centrifuge,” which takes 1.0 min to turn through 20 complete revolutions before re. eom7r)t gxk*aching its final speed. (a) What was its angular acceleration (assumed constant), $rev/min^2$ (b) what was its final angular speed in rpm? $rpm$