$9\mathrm{.}65$ A $22$ in$.{?}^{\text{I}}$ by $34$ in$.$ speed limit sign is supported on a $3-$in$.-$wide, $5-$ft$-$long pole. Estimate the bending moment in the pole at ground level when a $30-$mph wind blows against the sign. $($See Video V$9\mathrm{.}14.)$ List any assumptions used in your calculations$\mathrm{.}9\mathrm{.}65$ A $22$ in$.{?}^{\text{I}}$ by $34$ in$.$ speed limit sign is supported on a $3-$in$.-$wide, $5-$ft$-$long pole. Estimate the bending moment in the pole at ground level when a $30-$mph wind blows against the sign. $($See Video V$9\mathrm{.}14.)$ List any assumptions used in your calculations.