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The conservation of energy when only conservative forces are acting is
really only of significant usefulness in problems involving more than one
dimension - giving a really useful meaning to a force/space integral being
independent of path. Since there is only one dimension of time, the
usefulness of an analogaous approach for time dependent forces does not add
any great advatage (or difference) over the direct integration of N2 in
time.
Bob Sciamanda
Physics, Edinboro Univ of PA (Em)
treborsci@verizon.net
http://mysite.verizon.net/res12merh/