Each of the three helicopter rotor blades shown in fig, Ask an Expert

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Each of the three helicopter rotor blades shown in Fig. 10-67 is 5.20 m long and has a mass of 195 kg. The rotor is rotating at 228 rev/min.

(a) What is the rotational inertia of the rotor assembly about the axis of rotation? (Each blade can be considered to be a thin rod rotated about one end.)

(b) What is the total kinetic energy of rotation?

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