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Line integral

  1. Jun 24, 2011 #1
    There are line integral with respect to arc length and line integral with respect x/y.

    I know [itex]\int_C Pdx+Qdy[/itex] is useful to calculate the work. When do we need the line integral with respect to arc length?
     
  2. jcsd
  3. Jun 24, 2011 #2

    LCKurtz

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    Suppose you have a wire with a density which varies along its length. You need an arc length type integral to evaluate its mass.

    [tex]M =\int_C \delta(s)\,ds[/tex]
     
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