Physics - Vectors Question with Solution | TestHub

Two forces ${\vec{F}}_1$ and ${\vec{F}}_2$ of equal magnitude produce a resultant of $4N$. When ${\vec{F}}_2$ is reversed in direction and applied along with ${\vec{F}}_1$ resultant is of $2\sqrt{5}\mathrm{N}$. Find magnitude of ${\vec{F}}_1$ in newton.