A structural member subjected only to two end forces is in equilibrium when the forces are
Correct answer: C. Equal, opposite, and collinear
- A. Unequal, opposite, and collinear
- B. Equal, parallel, and perpendicular
- C. Equal, opposite, and collinear
- D. Equal, opposite, and concurrent elsewhere
Explanation
A two-force member carries only axial tension or compression when its two end forces are equal, opposite, and act along the same straight line. If the forces are not collinear, they create a net moment and the member cannot remain in equilibrium without another force or couple.
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About Structural Analysis
Structural analysis determines how beams, frames, trusses and arches carry loads through reactions, shear forces, bending moments, axial forces and deflections. It covers free-body diagrams, equilibrium equations, determinacy, influence lines and methods such as slope deflection, moment distribution and virtual work, while distinguishing analysis of a structure from its design.
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