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Homework Help: Quick units question on uniform circular acc

  1. Sep 18, 2009 #1
    1. The problem statement, all variables and given/known data

    A centripetal-acceleration addict rides in uniform circular motion with period T = 2.3 s and radius r = 2.80 m. At t1 his acceleration is = (6.60 m/s2) + (-2.40 m/s2). At that instant, what are the values of (a)v dot a and (b) r X a ?

    2. Relevant equations

    i know the answers, im just really unsure of the units

    3. The attempt at a solution

    the answers are both zero but what are the units?
  2. jcsd
  3. Sep 18, 2009 #2


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    Can you do dimensional analysis? For example v dot a has dimensions of velocity times dimensions of acceleration.
  4. Sep 18, 2009 #3
    yeah, i got it, i just wasn't sure if that was quite the right approach
    thanks though
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