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What is easier to measure, angle or velocity?

  1. Jul 27, 2010 #1
    In general, on earth, angle is easier to measure with a reference point, but what about measuring something in space (with no reference point?)
  2. jcsd
  3. Jul 27, 2010 #2
    Angle only makes sense if you have 2 intersecting lines. I'm not sure what you're asking here. This sounds like a linear algebra question.
  4. Jul 27, 2010 #3


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    Gold Member

    If you're measuring something in space, you really can't measure somethings tangential velocity without measuring its angular velocity as far as I know.
  5. Jul 27, 2010 #4
    Why? Take two snapshots in small time intervals and divide the change in position by the time interval.

    You get tangential velocity by definition.
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