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SHM- Problem with negative signs

  1. Oct 2, 2011 #1
    I have problems understanding the use of negative signs in SHM. ie. mx''=-kx

    Why is there a negative sign for the constant k and what does the negative sign mean?
     
  2. jcsd
  3. Oct 2, 2011 #2

    Doc Al

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    Staff: Mentor

    The negative sign in Hooke's law tells you that the force is opposite to the displacement from equilibrium. If x is positive, then the force is negative. And vice versa.

    The negative sign is not part of the constant k.
     
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