Question: A 0 . 5 m - diameter cork sphere ( SG = 0 . 2 1 ) is attached to the bottom of a river

A 0.5m-diameter cork sphere (SG=0.21) is attached to the bottom of a river with a thin cable, as is illustrated in the figure below. If the sphere has a drag coefficient of 0.5, determine the river velocity. Both the drag on the cable and its weight are negligible.
A 0 . 5 m - diameter cork sphere ( SG = 0 . 2 1 )

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