Statically indeterminate is a condition when the equilibrium equations force and moment equilibrium conditions are insufficient for determining the internal forces and reactions on that structure. The term, and its opposite, statically determinate, are used in statics, structural mechanics, and mechanical engineering.
Mathematics
Based on Newton's laws of motion, the equilibrium equations available for a two-dimensional body are: Note that the system is completely constrained here.
The system becomes an exact constraint kinematic coupling.
The solution to the problem is: