Part B

As shown, a triangle has a base of $b=3\mathrm{.}40ft$ and a height of $h=2\mathrm{.}00ft.($Figure $1)$ What is $k_x,$ the triangle's radius of gyration about the $x$ axis?

Express your answer numerically to three significant figures and include the appropriate units.

View Available Hint$($s$)$

$$

$k_x=$

$$

Part C

What is $k_O,$ the polar radius of gyration of a circle of radius $r=1\mathrm{.}10ft,$ when the pole is a point O on the circumference of the circle? $($Figure $2)$

Express your answer numerically to three significant figures and include the appropriate units.

View Available Hint$($s$)$

$$

$k_O=$

$$

Part D

A column of a known length is subjected to a given load and will buckle if the column's radius of gyration is under $k_x=0\mathrm{.}750ft.$ If the column has a circular cross section $($Figure $3),$ what is the smallest cross$-$sectional radius, $r,$ that the column can have without buckling?

Express your answer numerically to three significant figures and include the appropriate units.

View Available Hint$($s$)$

$$

$r=$

$$

$$

Figure

$1$ of $3$

Figure

$2$ of $3$

Figure

$3$ of $3$