[填空题]
Pilots can be tested for the stresses of flying highspeed s1ij .+tk6,5)bk e bh;.ovmoalqju0njq9lacv l1 +xrwm)w)9dwkqp77ets in a whirling “human centrifuge,” which takes 1.0 min to turn through 20 complete revolutions before reaching its final speedcv+ w9wkpw7m) lr7dxqql) 9a1 . (a) What was its angular acceleration (assumed constant), $rev/min^2$ (b) what was its final angular speed in rpm? $rpm$