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Force of a spring

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  1. Feb 10, 2015 #1
    1. The problem statement, all variables and given/known data
    What force is necessary to stretch a spring 48 cm, if the spring constant is 270 N/m?

    2. Relevant equations

    1/2kx^2
    3. The attempt at a solution
    tried plugging everything into equation and got 31 but it is wrong. Any help would be greatly appreciated
     
  2. jcsd
  3. Feb 10, 2015 #2

    gneill

    User Avatar

    Staff: Mentor

    What units came out of your attempt to plug in value to that equation? Did you check to see that they matched what you're looking for?

    Look for a more relevant Relevant equation. Hint: Hooke's Law.
     
  4. Feb 10, 2015 #3
    The quantity you're looking for is force. The quantity your equation gives you is?
     
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