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Homework Help: BALL DROP EXPERIMENT: calculation of the magnitude of G

  1. Sep 9, 2013 #1
    I plotted the distance in cm ( y2-y1) versus the average change in time squared. (This had to be done by hand...) Then I had to find the slope and the y-intercept. Then I was asked to, " ... From your slope, find the magnitude of the acceleration due to gravity (g)" ....


    I am really confused as to where am I supposed to plug the value of the SLOPE in this equation:

    change in y=-1/2g(t)^2 >>>> yf-yi=-1/2g(t2-t1)^2

    I also don't understand why I wrote down y=mx+o -- something about velocity being zero

    I know it's really simple but for some reason I am just not getting it.

    This isn't really homework, it's a lab calculation. I apologize if this question classifies as a
    "homework question"
     
  2. jcsd
  3. Sep 9, 2013 #2
    You already have the value of slope its -1/2g=m
    so, what's the problem? The equation follows from ##y=ut -(1/2)gt^2## and u's zero.
     
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