Cameroon Baccalauréat Série F1

Practice session

Two forces $\vec{F}_1$ of magnitude $300\text{ N}$ along the $+x$-axis and $\vec{F}_2$ of magnitude $400\text{ N}$ along the $+y$-axis act simultaneously at point $O$. What is the magnitude of the resultant force $\vec{R}$?

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