Two somewhat heavy people enter an elevator. Based on their weight, the force that they exert on the steel cable (20 meter length, 0.05m diameter, Young's modulus = 2.0 X 1011 Pa) that suspends the elevator car in its shaft is 2500 N. How many mm will the elevator cable stretch? %3!

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Buckling of columns

The column is described as a vertical member of the structure that carries an axial compressive load, and buckling is a lateral deformation of the column under the application of load.