For the case of infinite horseshoe vortices along the lifting line, a – McqOptions

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1.	For the case of infinite horseshoe vortices along the lifting line, a vortex sheet exists which_________
A.	Is formed by continuous trailing vortices
B.	Is perpendicular to free-stream velocity
C.	Total strength is zero
D.	Equal and opposite trailing vortices
Answer» C. Total strength is zero

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