[填空题]
A helicopter rotor blade can be considered ajbqtnzy5: *db6 1y)x4,3ht ss a(zi ww long thin rod 3+ad 0lmc/qwfb 8majl2d(5 qg, as shown in Fig. 8–46q0lc2 ldb amd/8j3a+5g m(wfq. (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
