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Figure shows three vectors `vec(a), vec(b)` and `vec(c)`, where R is the midpoint of PQ. Then which of the following relations is correct? A. `vec(a)+vec(b)=2vec(c)`B. `vec(a)+vec(b)=vec(c)`C. `vec(a)-vec(b)=2vec(c)`D. `vec(a)-vec(b)=vec(c)` |
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Answer» Correct Answer - A `vec(a)=vec(c)+vec(RP)` and `vec(b)=vec(c)+vec(RQ)` but `vec(RP)=-vec(RQ)` `rArr vec(a)+vec(b)=2vec(c)+vec(RP)+vec(RQ) rArr vec(a)+vec(b)=2vec(c)` |
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