Three vactors of equal magnitude are acting on the three sides of an equilateral triangle. The magnitude of their resultant is:
Correct answer: A. zero
- A. zero
- B. 3
- C. √3
- D. 1.73
Explanation
The three vectors act as shown in the diagram above. According to the head-to-tail rule, the resultant is obtained by joining the head of the last vector to the tail of the first vector. Therefore, the resultant vector obtained is zero.
This question appeared on the ETEA MDCAT 2011 paper, which you can sit online with every answer explained.
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About Addition of Vectors
Vector addition combines directed quantities using the head-to-tail, parallelogram and component methods. Work includes finding the resultant magnitude and direction for two or more vectors, resolving vectors into perpendicular components, and distinguishing vector addition from scalar addition, where direction has no role.
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