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+clc
+//initialization of the problems
+clear
+s=1.6 //m
+s1=4 //m
+pi=28 //degrees
+w=16 //kg/m^2
+p=100 //kg/m^2
+pl=20 //cm
+pb=10 //cm
+r=500 //kg/m^3
+Zx=54.8 //cm^3
+Zy=3.9 //cm^3
+// calculations
+pi=pi*%pi/180 //radians
+W=w*s+8.1
+P=p*s
+L=P+W*cos(pi)
+Mx=L*s1^2*100/8
+sigma_1=Mx/Zx
+My=W*sin(pi)*s1^2*100/8
+sigma_2=My/Zy
+sigma=sigma_1+sigma_2
+// results
+printf('Maximum stresses are %d kg/cm^2, tension or compression',sigma)