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Statics is the branch of physics that is concerned with physical systems[?] that are in static equilibrium, that is, in a state where the relative positions of subsystems do not vary over time.

By Newton's second law, this situation implies that the net force on every subsystem[?] is zero. From this constraint, such quantities as stress or pressure can be derived.

Statics is thoroughly used in the analysis of structures, for instance in civil engineering and mechanical engineering.

Hydrostatics[?] is concerned with analyses of systems in static equilibrium which involve flotation.

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