An object's equilibrium state can be categorized based on the force systems acting on it. They are collinear, coplanar concurrent, and coplanar non-concurrent forces. Consider two individuals exerting equal and opposite forces while pulling a rope. The two forces acting on the rope are collinear such that the net force on the rope is zero. The system is in equilibrium. In a coplanar concurrent force system, all the forces meet at a single point on the same plane. Here, these forces can be resolved into their horizontal and vertical components. For a system to remain in equilibrium, the upward and downward vertical forces must balance. Similarly, the leftward and rightward horizontal forces must also be equal and oppositely directed. In a coplanar non-concurrent force system, the forces acting on the object are parallel. Here, the moment due to F3 is clockwise and is balanced by an anticlockwise moment due to F2. Similarly, F1 is counterbalanced by the object's weight and the net moment and the net force on the object are zero, maintaining the equilibrium.