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Total Length of the spring

  1. Mar 2, 2016 #1
    1. The problem statement, all variables and given/known data
    If I found how much it stretches, do I just add it to the original length I started with to find total new length?
    For instance, the original length was 1.168m and I found x to be 0.90m, do I just add them together for the total length?

    2. Relevant equations
    F=kx

    3. The attempt at a solution
    1.168m + 0.90m
     
  2. jcsd
  3. Mar 2, 2016 #2
    Your post is vague; you should post the entire question to help people help you. Not exactly sure what you are trying to solve for here. From what you have, all I can say is that you should keep in mind that the x in Hooke's law is the change from the initial position of the spring to the final position.
     
  4. Mar 2, 2016 #3
    I have to find the total stretched length
     
  5. Mar 2, 2016 #4
    The total stretched length when? Is there a force acting upon the spring?
    But to answer your question more directly, if you are correctly solving for x (which I cannot confirm without the problem info), then that is the change in x. Adding the initial x position and the change in x will give you the final x position or "total length" I assume.
    Δx = xf - xi......so Δx + xi = xf
     
  6. Mar 2, 2016 #5
    For the linear relation f=kx it is referring to displacement. I agree it's not to clear what you mean by total length of the spring, or displacement of the spring. In theory you could "uncoil" the spring to a straight wire with no curvature and directly measure the total length of the spring or come up with some mathematical relation for length of spring to calculate it. But I think you are referring to talking about displacement and not total length of the spring.
     
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