Determine the combined force magnitude

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    Force Magnitude
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Discussion Overview

The discussion revolves around determining the combined force magnitude from two force vectors, specifically vector a=2i+-5j and vector b=-8i-3j. The conversation includes elements of vector addition and basic Newtonian mechanics.

Discussion Character

  • Homework-related
  • Mathematical reasoning

Main Points Raised

  • One participant presents the vectors a and b and asks for the combined force magnitude.
  • Another participant questions the understanding of vector addition and suggests drawing a picture for clarity.
  • A participant expresses difficulty in calculating the magnitude, initially arriving at -14.
  • Another participant asserts that the answer must be positive, indicating a potential error in the calculation.
  • A participant revises their calculation and suggests that the combined force magnitude is 10 after correctly adding the components.
  • There is a clarification regarding the correct form of the vectors, confirming that the initial posting was accurate.
  • A participant expresses relief upon confirming that their revised answer of 10 is correct, acknowledging previous confusion.

Areas of Agreement / Disagreement

Participants generally agree on the correct form of the vectors and the resulting magnitude of 10, although there was initial confusion and disagreement regarding the calculations.

Contextual Notes

There are indications of confusion regarding the addition of vector components and the interpretation of negative values in the context of force vectors.

Who May Find This Useful

Individuals interested in vector addition, basic physics concepts, and those seeking assistance with similar homework problems may find this discussion useful.

sdjackson79
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a force represented by the vector a=2i+-5j and the other exerts a force b=-8i-3j determine the combined force magnitude
 
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do you know what vectors are and how they are added? do you know basic Newtonian mechanics?

try drawing a picture, it should clarify things.
 
I am having trouble with it I keep getting - 14
 
what exactly are you doing? the answer is most definitely positive.
 
sorry I scrwed up (2i+5j)+(-8i-3j) I add the horizontal components then add the vertical components then simplify. I came up with 10 does this look right
 
which is the correct form of the vectors? in your first post it was 2i-5j and -8i-3j. that way the magnitude of the sum force is 10.
 
Sorry the first posting was the correct one 10 is the answer feeling kinda stupid thank you for the help
 

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