[填空题]
Pilots can be tested for the stresses of flying highspeed m- ht:lf (nqip qbs2jl,e);s+ j)fdbglkn0 , j/ets in a whirling “human centrifuge,” which takes 1.0 min to turn through 20 complete revolutions before reaching ifb k/ ,0jgnl)dts final speed. (a) What was its angular acceleration (assumed constant), $rev/min^2$ (b) what was its final angular speed in rpm? $rpm$