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Principle of superposition

  1. Jul 14, 2006 #1
    step 1
    i have a spring with two ends i and j. I fix i and pull j to a displacement and measure the force at i and j called fi and fj

    step 2
    now i fix j and pull i to a displacement and measure the force at i and j called fi and fj

    principle of superposition says that the total force at i and j (Fi and Fj)is equal to

    Fi=fi(step1)+fi(step2)
    Fj=fj(step2)+fj(step2)

    i don't understand how the forces in both the steps are added. What is the principle of superposition

    is there any website ?
     
  2. jcsd
  3. Jul 14, 2006 #2

    HallsofIvy

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    Staff Emeritus
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    Clarify your terms. What is the difference between "the force at i", fi, and the "total force at i", Fi? If fi is not the "total force" how are you measuring it?
     
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