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Homework Help: Is this a trick question or is it just that simple? (magnitude and unit vector)

  1. Sep 1, 2011 #1
    1. The problem statement, all variables and given/known data
    okay i dont have the exact problem in front of me right now but it went something like this: they gave the force, F, which equaled 500 N. for part a they said to express in terms of a magnitude times a unit vector. for part b they wanted the force expressed in orthogonal terms.

    another note: the force makes equal angles with respect the x,y,z axis'
    (theta x = theta y = theta z)
    the only value given is that of the force.

    2. Relevant equations
    F = to the magnitude times unit vector

    3. The attempt at a solution
    a) F being 500 N
    F = magnitude of F times e
    e being the unit vector

    b) for part be would it simply be
    F = magnitude of F times (ei + ej + ek)

    i know the question was just paraphrased but is that what its asking for?
  2. jcsd
  3. Sep 2, 2011 #2


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    Homework Helper

    No, that is wrong. ei+ej+ek is not a unit vector. Find the vector F in the form Fxei+Fyej+Fzek, so that Fx2+Fy2+Fz2=F2
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