Statics
Statics is the branch of mechanics
that is concerned with the analysis of loads (force and torque, or
"moment") on physical
systems in static equilibrium, that is, in a state where the relative
positions of subsystems do not vary over time, or where components and
structures are at a constant velocity. When in static equilibrium, the system
is either at rest, or its center of mass moves at constant velocity.By Newton's first law, this situation implies that the net force and net torque (also known as moment of force) on every part of the system is zero. From this constraint, such quantities as stress or pressure can be derived. The net forces equaling zero is known as the first condition for equilibrium, and the net torque equaling zero is known as the second condition for equilibrium. See statically determinate.
