The magnitude of the resultant of two vectors (forces) can be found using the formula derived from the law of cosines: $|R| = \sqrt{|F_1|^2 + |F_2| ^2 + 2|F_1||F_2|\cos\theta}$, where $\theta$ is the angle between the forces.
Two forces of 5.0 N each are acting on a point mass. If the angle between the forces is 60°, then the net force acting on the point mass has magnitude close to :
Asked in UPSC NDA 1 2023 · Topic: Mechanics (Newton's Laws of Motion and their applications)
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