Aluminum pole for a street light weights 4600N and supports an arm that weights 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 18mm.
Determine the maximum tensile and compressive stresses σt and σc, respectively, in the pole (at its base) due to the weights and the wind force.

Transcribed Image Text:

W2 660 N .2 m Pi 300 N Wi = 4600 N 18 mm 9 m 225 mm