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Unread 17-05-2005, 09:35
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AKA: Stephen Denman
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Re: Springs and Work

from my double maths

EPE (elastic potential energy / work done from natural length) = lambda x^2 /2l
i've attached a spreadsheet
first, work out value of the spring force thing (grr can't remember proper name)
even better you can work out lambda/2l
from the working you can see you get this to be 2/144
then use this value to work out the work done in extending the spring from the point with no extention, to x=5 and x=10, and work out the difference

i get 25/24, or1.041667
Hope this helps
Attached Files
File Type: xls energgy.xls (14.5 KB, 44 views)
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