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Homework Help: Finding the components of this vector

  1. Feb 25, 2006 #1
    How is the vector g turning into the scalar g? What am I missing that is
    allowing us to represent g as a scalar quantity and no longer a vector
    quantity? When going through the algebra to find mg_x, (component
    of gravity in the x-direction) I don't see how it turns into a
    scalar of 9.8.

    http://img124.imageshack.us/img124/3417/page00023ue.jpg [Broken]
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Feb 25, 2006 #2
    When they say [itex]g[/itex] instead of [itex]\vec{g}[/itex] they mean the magnitude of [itex]\vec{g}[/itex], i.e. [itex]g=|\vec{g}| = \sqrt{g_x^2 + g_y^2}[/itex].
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