A uniform helicopter rotor blade is 7.80 m long, has a mass of 110 kg, and is

Question:

A uniform helicopter rotor blade is 7.80 m long, has a mass of 110 kg, and is attached to the rotor axle by a single bolt.

(a) What is the magnitude of the force on the bolt from the axle when the rotor is turning at 320rev/min?

(b) Calculate the torque that must be applied to the rotor to bring it to full speed from rest in 6.70 s. Ignore air resistance. (The blade cannot be considered to be a point mass for this calculation. Why not? Assume the mass distribution of a uniform thin rod.)

Distribution
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