$\sum _{}{\mathrm{F}}_{\mathrm{y}}={\mathrm{F}}_1-{\mathrm{F}}_2-\mathrm{P}=0$

From this equation, we can see that there are two unknowns (${\mathrm{F}}_1$ and ${\mathrm{F}}_2$). We cannot solve one equation with two unknowns.

Since statics alone does not provide enough information for a solution, this type of problem is called statically indeterminate. To solve the problem, we must develop a second equation.