Two forces having magnitudes 3.5N and 5.5N are acting on a body. Which one of the following cannot be the resultant of their possible sum?
Correct answer: A. 1.5 N
- A. 1.5 N
- B. 2.5 N
- C. 4.5 N
- D. 6.5 N
Explanation
1.5 N cannot be the resultant of their possible sum because neither the subtraction, nor the addition of both values gives 1.5. The value of resultant can only be subtracted value or additional value which will either be 5.5-3.5= 2 whereas additional value = 5.5+3.5 = 9 so the resultant can range from 2 till 9.
This question appeared on the ETEA MDCAT 2014 paper, which you can sit online with every answer explained.
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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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