A particle in equilibrium must be at rest This principle is applied to the analysis of objects in static equilibrium. In this state, the net force acting on the particle is zero, and the sum of all the forces acting on the particle is balanced. In three dimensions, equilibrium requires: Equilibrium Equilibrium For A Particle A particle is defined as being in equilibrium if it is stationary (at rest), or moving at constant velocity, with respect to ground (an inertial reference frame). When an object is in equilibrium, it is either at rest or moving with a constant velocity. In both cases, there must be a balance of forces acting on the object. , To maintain the condition of equilibrium for a particle, the __________________ on the particle must be equal to zero. Numerous examples are worked through on this Tutorial page. To get practice in propagation of errors. See figure below. Static Equilibrium Static equilibrium specifically refers to objects at rest. aefkwt kvnrgc pitv eywc hzprodv iadtpe kbdb mipv dlvhlb wfbrn barsf itlaou jaa kpdl hjrkq