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Spring - Energy Conservation

  1. Apr 23, 2017 #1
    1. The problem statement, all variables and given/known data problem.PNG

    2. Relevant equations

    Conservation Mechanical Energy

    3. The attempt at a solution

    I need to find how close to the wall the block will come. Since there's no friction, I presumed there'd be enough energy, and only enough energy, to go the same distance d to the left of A. Also note that d=-0.2m. This answer is incorrect however. I don't understand.
     
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  3. Apr 23, 2017 #2

    PeroK

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    Why do you think that ##d =0.2m##?
     
  4. Apr 23, 2017 #3
    This is given.
     
  5. Apr 23, 2017 #4

    PeroK

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    What's this force of ##18.8 N## then?
     
  6. Apr 23, 2017 #5
    Oh, I'm sorry I didn't realize something was missing. The force is taken away at point B.
     
  7. Apr 23, 2017 #6

    haruspex

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    Do not assume the block is at rest at that point.
     
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