Question

Derive expression for Magnitude of the resultant of

two vectors using the triangle law of vector addition?
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Answer 1

Triangle Law of Vector Addition Derivation

Consider two vectors \vec{P} and \vec{Q} that are represented in the order of magnitude and direction by the sides OA and AB, respectively of the triangle OAB. Let \vec{R}be the resultant of vectors \vec{P} and \vec{Q}. Above equation is the magnitude of the resultant vector.