an axial pull of 40 kn is acting on a stepped bar consisting of three sections of length 30cm , 25 cm , and 20cm , and of diamter 2cm , 4cm ,and 5cm respectively . if e = 2.1× 10^5 n/mm^2 , determine a) stresses in each section and b) total elongation of the bar .a brass bar having c/s area of 1000mm^2 is the subjected to axial forces as shown below. find the total elongation of the bar . modulus of elasticity of brass =100gn/m^2.
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L2 = 25cm = 250mm.
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