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Homework Help: Circular motion radius

  1. Feb 20, 2008 #1
    1. The problem statement, all variables and given/known data
    Hi, I conducted a circular motion experiment--with a rubber bung & string through a plastic tube. I changed the radius of the string every trial, calculated the amount of time for one revolution, and from that derived velocity and velocity^2.

    With my data, I graphed Velocity^2 against Radius. I found a linear line of best fit for the graph.
    From here, how should I proceed to obtain the formula acceleration = V^2/r?

  2. jcsd
  3. Feb 20, 2008 #2
    a=v^2/r => v^2=a*r

    so you need slope of your fit line
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