A sheet of plastic material \(0.5 \mathrm{in}\). thick, with specific gravity \(\mathrm{SG}=1.7\), is dropped into a large tank containing water. The sheet is \(2 \mathrm{ft} \times 4 \mathrm{ft}\). Estimate the terminal speed of the sheet as it falls with

(a) the short side vertical

(b) the long side vertical. Assume that the drag is due only to skin friction, and that the boundary layers are turbulent from the leading edge.