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The components of vectors Q and R are (-3.0, 5.5) and (9.2, 4.4) respectively. Determine...

Physics
WAEC 2021

The components of vectors Q and R are (-3.0, 5.5) and (9.2, 4.4) respectively. Determine the components of Q + R.     

  • A.  (3.7, 7.4)        
  • B. (6.2, 9.9)   
  • C.   (2.5, -4 .8).     
  • D. (14.7, 1.4)
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Correct Answer: Option B
Explanation

Put the vectors in their component forms

Q( -3.0i, 5.5j) and P(9.2i, 4.4j)

Q + P =  -3.0i, 5.5j + 9.2i, 4.4j = ( - 3.0 + 9.2)i  +  ( 5.5 + 4.4)j = ( 6.2i + 9.9j)

therefore Q + P = (6.2 , 9.9).

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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