[填空题]
A helicopter rotor blade can be considered a long .lu5g cbw+ u0baw n,k-thin rod, as shoxzs cve,-5rhd t2f9z1wn in Fig. 8–46. c9z2h,sx 5dzr-e1tvf (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
