[填空题]
A helicopter rotor blade can be considevy+)i+ti*jjw pxy) l6 red a4zl*u7d kv:sh+;lv xhgzh3 y j 1(0xpi long thin rod, as shown in Fig. 8–467l+gyv0:l zjsxuxh d;vz1k h4*ih3p (. (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
