[填空题]
Pilots can be tested fod+ hm2 gb h:nq+vh)de.r the stresses of flying highspeed j (rdg 1t,zvyl0ets in a whirling “human centrifuge,” which takes 1.0 min to turn through 20 complete revolutions before reaching it10 (d zyvglt,rs final speed. (a) What was its angular acceleration (assumed constant), $rev/min^2$ (b) what was its final angular speed in rpm? $rpm$