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Homework Help: Work Conceptual Questions

  1. Feb 21, 2009 #1
    1. The problem statement, all variables and given/known data

    This is conceptual question...Is work a scalar or vector quantity? Is it force times distance or displacement?

    And it just Fdcostheta by definition of the dot product. Why is it cos theta even when you calculate work done by gravity?

    2. Relevant equations

    Fdcos theta

    3. The attempt at a solution

    Just need conceptual clarification.
     
  2. jcsd
  3. Feb 21, 2009 #2
    hello,

    just check http://en.wikipedia.org/wiki/Mechanical_work" [Broken]

    I suppose,it helps.

    Dot product of two vectors is scalar :smile:
     
    Last edited by a moderator: May 4, 2017
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