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Problem $07\mathrm{.}023-$ Boundary Layer Thickness Analysis $($Laminar and Turbulent Flow Past a Flat Plate$)$

Suppose you buy a $49-$ft sheet of plywood and put it on your roof rack, as in the image. You drive home at $\backslash (25\backslash$mathrm$\{$mi$\}/\backslash$mathrm$\{$h$\}\backslash ).$

Problem $07\mathrm{.}023.$b $-$ Friction Drag Analysis $($Laminar and Turbulent Flow Past a Flat Plate$)$

Calculate the boundary layer thickness and the drag force if the flow is turbulent.

The boundary layer thickness is

$*$ in$.$

The drag force is

N$.$