What does the 'sum' in vector addition refer to?

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SUMMARY

The term 'sum' in vector addition refers to the combination of the individual components of vectors, specifically the i, j, and k components. It does not imply the simple addition of magnitudes. To determine the magnitude of the resultant vector, one must first sum the components and then apply the square root of the sum of the squares of these components. This process is essential for accurately calculating the resultant vector in physics and engineering applications.

PREREQUISITES
  • Understanding of vector components (i, j, k)
  • Basic knowledge of vector magnitude calculation
  • Familiarity with the Pythagorean theorem
  • Concept of resultant vectors in physics
NEXT STEPS
  • Study vector component addition techniques
  • Learn how to calculate vector magnitudes using the Pythagorean theorem
  • Explore applications of resultant vectors in physics
  • Investigate graphical representation of vector addition
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Students in physics or engineering, educators teaching vector mathematics, and professionals working with vector analysis in various scientific fields.

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I have a question on 'vector addition'. I know that resultant is the sum of two or more vectors. But this sum doesn't mean the sum of magnitudes of two or more vectors, right? So what does that 'sum' refer to? Combined effect? Hope you can answer my question, thanks.
 
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The sum is the addition of the i, j, and k components of the vector. To find the magnitude of the sum you first need to add the components then find the magnitude of the resultant vector. i.e. take the square root of the sum of the squares.
 

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