[填空题]
A helicopter rotor blade can b5 (4pfh )ob,spk s0lkre considered a long thin rod, as shown in pou:wggam 6t,a46+ao4vl r*n.d g5 doFig. 8–46d o 4w+gtma,go.l5dag o6:p4ua r*v6n. (a) If each of the three rotor helicopter blades is 3.75 m long and has a mass of 160 kg, calculate the moment of inertia of the three rotor blades about the axis of rotation. $kg \cdot m^2$ (b) How much torque must the motor apply to bring the blades up to a speed of 5 $rev/s$ in 8.0 s? $m \cdot N$
Post time 2025-2-18 20:00:22
