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Homework Help: Quick vector notation question

  1. Feb 24, 2010 #1
    1. The problem statement, all variables and given/known data
    My prof has written out a derivation which says:

    [tex]\vec{a_{t}}[/tex] = α x [tex]\vec{r}[/tex]

    Why does everything except α have a vector sign on it? I think α should be a vector here too...

    By the way, he also derived dv/dt = ω, and v had a vector symbol but ω did not. Is that right or should ω be a vector?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Feb 24, 2010 #2


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    Science Advisor
    Homework Helper

    Hi jumbogala! :smile:

    You're right, he's wrong! :rolleyes: :biggrin:

    (there's probably some psychological reason for it! :wink:)

    Yes, α and ω are definitely vectors, exactly like a and r. :smile:
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