Question

State the parallelogram law of vector addition. Derive the expression for the magnitude and direction of the resultant of two vectors inclined at an angle θ from each other.

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Answer 1

Let two vectors P and Q act simultaneously on a particle O at anangle . They are represented inmagnitude and direction by the adjacent sides OA and OB of aparallelogram OACB drawn from a point O.Then the diagonal OC passing through O, will represent the resultantR in magnitude and direction.