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Homework Help: Finding g given height & time

  1. Sep 5, 2007 #1
    Calculating "g" given height & time

    This problem is part of a physics lab. I need this step to finish the other parts of the lab, and I can't figure out how to do this step.

    1. The problem statement, all variables and given/known data

    Using the best estimate and uncertainty for the fall time, calculate the value of "g" with the appropriate number of significant figures.

    fall time = 0.4249 +/- 0.0001 seconds
    height = 1.002 +/- 0.005 meters

    2. Relevant equations

    acceleration = height/(time)^2 (?)

    3. The attempt at a solution

    I'm not even sure where to start...
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
    Last edited: Sep 5, 2007
  2. jcsd
  3. Sep 5, 2007 #2


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    Homework Helper

    Use the formula

    d = v1*t + (1/2)at^2

    apply this formula to this situation...
  4. Sep 5, 2007 #3


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    Science Advisor

    Since in this problem, the object is "falling" (i.e. not thrown up or down), v1= 0. Put in the given values for d and t and you have a single equation to solve for a (for gravity problems, a= v).
  5. Sep 5, 2007 #4
    Thanks to both of you for your help :)
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