Question $2$

$10$ points

A thin equilateral triangle plate with $a=95cm($as shown below$)$ is immersed parallel to a $U_{}=11\mathrm{.}5\frac{m}{s}$ stream of air at $20C$ and $1$ atm. Assuming $R{e}_{cr}={10}^6$ and laminar flow, estimate the drag of this plate. Take the density and dynamic viscosity of air at $20C$ and $1$ atm, as ${}_a=1\mathrm{.}2k\frac{g}{m^3}$ and $=1\mathrm{.}8{10}^{-5}k\frac{g}{ms}.$

Figure $1$ : Flow over equilateral triangle plate.

i$)$ Drag force: Number Units

Section Attempt $1$ of $2$

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