[填空题]
A helicopter rotor blade can sw,-bmd 0w; r j5.arwsbe considered a long thin rod, as:a1fuuf w vi;6 shown in Fig. 8–46.: ufwf6 u1i;av (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
