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

by hsut
Tags: discuss, energy, mass, meaning, result, spring
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hsut
#1
Nov14-12, 09:38 AM
P: 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
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voko
#2
Nov14-12, 11:10 AM
Thanks
P: 5,869
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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