a) \(\frac{x_2-x_1}{l_e}\)
b) \(\frac{y_2-y_1}{l_e}\)
c) \(\frac{x_1-y_1}{l_e}\)
d) \(\frac{x_2-y_2}{l_e}\)
Answer: b
Explanation: A truss is a two node element which allows arbitrary orientation in XYZ co-ordinate system. The 3D truss element can be treated as straight forward generalization of the 2D truss element.
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