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Homework Help: Direction of work of block colliding with spring

  1. Feb 6, 2010 #1
    a general question.
    suppose i have a spring and a block colliding it.
    the direction of the work vector is it defined by F or by X.
     
  2. jcsd
  3. Feb 6, 2010 #2
    Re: work

    I never thought of work as a vector. As far as I can remember it is the scalar multiplication of force and distance. The fact that the work done on a path normal to the direction of force is zero (think about a frictionless surface and an object already moving along the surface) supports what I remember.
     
  4. Feb 6, 2010 #3
    Re: work

    Work done on or by a system

    It depend on which reference your book choice

    some books take the work done on a system as negative and in other books positive
     
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