A Ceiling Fan Has Five Blades, Each with a Mass

A ceiling fan has five blades, each with a mass of 0.34 kg and a length of 0.66 m. The fan is operating in its "low" setting at which the angular speed is 9.4 rad/s. If the blades can be approximated as uniform thin rods that rotate about one end, what is the total rotational kinetic energy of the five blades?

A) 35 J
B) 29 J
C) 23 J
D) 17 J
E) 11 J

Correct Answer:

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