[填空题]
A helicopter rotor blade zg0 .2 jfmm. stjkq/:vcan be considered a long thin rod, as shown in Fig. 8–s. h.y.1s(m y,(wr swn6ep4s( sjqlsw4 s yj6essnms4 yw.q(wspr.((.slhw1 ,6. (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
