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Discuss the meaning of the result for total energy in a whole mass spring system

  1. Nov 14, 2012 #1
    1. The problem statement, all variables and given/known data
    Had to work out the total energy in a mass spring system (Part d of question), which has been found to be:

    (v^2*m/4)[sin^2(nt) + sin^2(3nt)]


    The next part of the question (e) says to 'Discuss the meaning of your result to part (d) above'

    And I have no idea what to write! It is worth nearly 10% of the whole assignment! Any help would be much appreciated.

    Thanks
     
  2. jcsd
  3. Nov 14, 2012 #2
    Your expression for total energy depends on time periodically. This cannot be true. It must either monotonically decay with time (if friction/resistance is present), or be constant.
     
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