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Homework Help: Centripital acceleration help

  1. Oct 4, 2011 #1
    1. The problem statement, all variables and given/known data
    There is a spinning disc. Object A sits R distance from center and object B sits R/2 distance away. VB=piR/T and VA=2piR/T

    2. Relevant equations
    Find the magnitude of the acceleration of object B. Assume that the cylinder makes one complete turn in a period of time .

    3. The attempt at a solution
    The answer is a=(2pi2R)/T2 .

    From using centripital acceleration=v2/R , i got

    There is a coefficient of 2 that I am missing in my answer from the correct solution, but I have double checked. Am I using the wrong formula here? where did the 2 come from in the answer?
  2. jcsd
  3. Oct 5, 2011 #2
    NVM. spent an hour on it and finally got it. Supposed to divide by R/2 not R
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