Hoerner states that the drag coeffi -cient of a flag of 2:1 aspect ratio is 0.11 based on the planformarea. The University of Rhode Island has analuminum flagpole 25 m high and 14 cm in diameter.It flies equal-sized national and state flags together. Ifthe fracture stress of aluminum is 210 MPa, what is themaximum flag size that can be used without breaking theflagpole in hurricane (75 mi/h) winds? (Neglect the dragof the flagpole.)

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Hoerner states that the drag coeffi -
cient of a flag of 2:1 aspect ratio is 0.11 based on the planform
area. The University of Rhode Island has an
aluminum flagpole 25 m high and 14 cm in diameter.
It flies equal-sized national and state flags together. If
the fracture stress of aluminum is 210 MPa, what is the
maximum flag size that can be used without breaking the
flagpole in hurricane (75 mi/h) winds? (Neglect the drag
of the flagpole.)

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