The main cross cable between towers of a coastal suspension bridge is 60 cm in...

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The main cross cable between towers of a coastal suspension bridge is 60 cm in diameter and 90 m long Estimate the total drag force on this cable in crosswind of 50 miles hour Is the flow laminar or turbulent Hint Use Fig 11 31 on page 595 of our textbook to find the drag coefficient S 400 200 100 60 40 20 10 6 4 2 1 0 6 0 4 0 2 0 1 0 06 10 1 24 CD R 100 101 102 Re Smooth cylinder 103 Smooth sphere 11 8 THE DRAG COEFFICIENT 104 Drag coefficients for a sphere and long cylinder Fig 11 31 105 Rough cylinder 106

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