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Step 1: Calculate internal forces in truss members using method of joints
Step 1: Calculate internal forces in truss members using method of joints



Step 2: Construct table of N, L and N^{2}L for all members
Step 2: Construct table of N, L and N^{2}L for all members



Step 3: U_{e} = U_{i} to calculate Δ _{B} ( →)
Step 3: U_{e} = U_{i} to calculate Δ _{B} ( →)



Useful formula:
Useful formula:



Now that you've mastered this question, you can try Question 1.