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Homework Help: Converting m/s to N?

  1. Sep 2, 2015 #1
    1. The problem statement, all variables and given/known data
    I'm charting vectors graphically and am given: 15m/s at 20 degrees + 6m/s at 90 degrees + 8 m/s at -135degrees. Do I have to convert the m/s into Newtons before graphing? Also, which direction would that -135degrees be in if you start at a point? I have no idea what the negative degrees mean and haven't found help online.

    2. Relevant equations

    3. The attempt at a solution
    Tried laying it out similar to if I had N and graphed it to scale, but my numbers were way off.
  2. jcsd
  3. Sep 2, 2015 #2
    A) No. existing units are just fine.
  4. Sep 2, 2015 #3
    Have you tried drawing a compass and showing the angles?

    If you plot x, y or z, positive is one way, and negative is the other way. So if your angles increase from 0 when you rotate counter-clockwise, what happens to the Angle when you go the other way?
  5. Sep 2, 2015 #4


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    Staff Emeritus
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    It makes no sense to convert to Newtons. The to sets of units refer to completely different physical quantities.

    Just use a convenient scale factor to lay the velocity vectors out graphically.
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