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Can the sum of three vectors, i.e., the...

Can the sum of three vectors, i.e., their resultant, be equal to zero ? Explain.

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Yes, if the resultant of any two of the vectors is equal and opposite to the third one , the resultant of the three vectors will be zero. Let `veca,vecb,vecc` be three vectors related as
`veca+vecb=-vecc`. Then `veca+vecb+vecc=0`
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