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Homework Help: Finding the net force

  1. Sep 9, 2011 #1
    1. The problem statement, all variables and given/known data

    Find the net force of

    3.4 N i + 3.0 N j

    and

    3.4 N i + -3.0 N j

    I entered 6.8 N i + 0 N j,

    It's marking 6.8 as incorrect. Why? Do you not just sum the components??
     
  2. jcsd
  3. Sep 9, 2011 #2

    Doc Al

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    Staff: Mentor

    Looks right to me. To find the net force, just add the components.
     
  4. Sep 9, 2011 #3
    Try 4.81?
     
  5. Sep 9, 2011 #4
    Last edited by a moderator: May 5, 2017
  6. Sep 9, 2011 #5
    Why?? It does me no good to just tell me an answer.
     
  7. Sep 9, 2011 #6

    Doc Al

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    Staff: Mentor

    For one thing, they ask for the acceleration, not the net force.
     
  8. Sep 9, 2011 #7
    So, does that mean that I should divide my net force by the mass scalar value?
     
  9. Sep 9, 2011 #8
    Bingo
     
  10. Sep 9, 2011 #9
    Thanks everyone.
     
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