If an axial force N is applied gradually to a bar which is linear elastic and has a constant cross sectional area A and length L, what will be the value of Ui ?

If an axial force N is applied gradually to a bar which is linear elastic and has a constant cross sectional area A and length L, what will be the value of Ui ? Correct Answer 1⁄2 N2L/AE

Once deformation is known, we can calculate the work done using earlier equations and then Ue = Ui.
Bissoy MCQ

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