[填空题]
Pilots can be tested *2sbd r8wn laxd212l nfor tl5rm fqfs h4..he stresses of flying highspeed jets in a whirling “human centrifuge,” which takesr5lqf.4mh.s f 1.0 min to turn through 20 complete revolutions before reaching its final speed. (a) What was its angular acceleration (assumed constant), $rev/min^2$ (b) what was its final angular speed in rpm? $rpm$