mechanics
posted by Josh .
A hollow steel tube of square cross section, whose outside dimension is 10cm on side and 5 mm thick, is loaded with compressive forces of 120 KN. What is the stress produced in the members.

mechanics 
drwls
(Compressive force)/(Cross sectional area)
The cross sectional area is (10 cm)^2  (9 cm)^2 = 19 cm^2
= 19*10^4 m^2
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