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Saturday, February 3, 2018

The arrow represents the vector R. Which diagram does not represent R as two perpendicular components?



Question 4
The arrow represents the vector R.


Which diagram does not represent R as two perpendicular components?








Reference: Past Exam Paper – June 2015 Paper 12 Q4





Solution:
Answer: C.

When facing such types of question, it is best to tackle it by drawing on the question paper itself.

The vector sum of the two perpendicular components should provide a resultant equal to the vector R shown.


By completing the diagram (by the parallelogram method, for example), we can observe that only choice C does not provide a resultant similar to the vector R shown. Instead, the resultant in C has a downward direction and thus, cannot be equal to the vector R shown.

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