Graphical Analysis of a Force System in civil engineering involves the use of graphical methods to analyze and solve force systems. It is a technique that allows engineers to visually represent and understand the forces acting on a structure or a system of interconnected members.

In graphical analysis, engineers use vector diagrams and graphical techniques such as the method of joints and the method of sections to determine the magnitude and direction of forces in different members of a structure. These methods rely on the principles of equilibrium, which state that the sum of forces and moments acting on a structure must be zero for it to be in a state of balance.

By using graphical analysis, engineers can determine the internal forces and reactions in various structural elements, such as beams, trusses, and frames. This information is crucial for designing and optimizing structures to ensure their stability and safety.

$**$Question: Which graphical method is commonly used to analyze truss structures?$**$ a$)$ Method of equilibrium b$)$ Method of joints c$)$ Method of sections d$)$ Method of moments

Please select the correct choice from the options provided.