An aluminum pole for a street light weighs 4600 N and supports an arm that weighs 660 N (see figure). The center of gravity of the arm is 1.2 m from the axis of the pole. A wind force of 300 N also...

An aluminum pole for a street light weighs
4600 N and supports an arm that weighs 660 N (see
figure). The center of gravity of the arm is 1.2 m from the
axis of the pole. A wind force of 300 N also acts in the (-y)
direction at 9 m above the base. The outside diameter of
the pole (at its base) is 225 mm, and its thickness is 18 mm.

Determine the maximum tensile and compressive
stresses σ_t
and σ_c, respectively, in the pole (at its base)
due to the weights and the wind force.