[填空题]
A helicopter rotor blade ca c.3r2g l7+buyymr9 efn be considered a long thin ro7kxu+3 l(1iu*ph5so u0cjeo ad, as shown in Fig. 8–46(lpu0 5s73oouhic1+a uex* j k. (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
