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Work and path dependence

  1. Nov 20, 2008 #1
    Is work done if the total displacement is 0?

    It doesn't matter what path the object took to get from A back to A, right? As long as it ends at A, then its zero work, correct?

    So work IS NOT path dependent, it's a state function, like energy, right ?
  2. jcsd
  3. Nov 20, 2008 #2


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    Re: Work

    In general, yes.
    No. In general even if the displacement is zero when a force acts on a moving object, work is done.
    Nope, work is path dependent.

    For example, consider dragging a block across a rough surface for a distance of ten meters and then dragging it back to the same place you started. Did you do work on that block?
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