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clear
//
//Given
//Variable declaration
delL=2.1 //Instantaneous extension in mm
L=3*10**3 //Length of bar in mm
A=5*100 //Area of bar in mm
h=4*10 //Height in mm
E=2e5 //Modulus of elasticity in N/sq.mm
//Calculation
V=A*L //Volume of bar in mm^3
//case(i):Instantaneous stress induced in the vertical bar
sigma=int(E*delL/L)
//case(ii):Unknown weight
P=(((sigma**2)/(2*E)*V)/(h+delL))
//Result
printf("\n Instantaneous stress = %0.3f N/mm^2",sigma)
printf("\n Unknown weight = %0.3f N",P)
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