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Homework Help: Proving gravity

  1. Sep 21, 2008 #1
    Hi all at physics forums,
    I was given the task of proving that gravity on earth is actually 9.81. It must be a proof/lab design and must be creative. We are not allowed to simply just drop 3 objects with different masses and calculate their acceleration. Need an original idea, not asking for anyone to do it for me but just to give me a decent idea. Thanks in advance.
  2. jcsd
  3. Sep 21, 2008 #2


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    Homework Helper

    Welcome to PF.

    What equations do you know that relate gravity to variables you can measure like time and distance? What can you vary to deduce the value through measurement? Or how might you be able to slow the acceleration of gravity in a controllable way?
  4. Sep 21, 2008 #3
    Isaac Newton did it. Maybe you could find out how he did it and reproduce his experiments.

    Just an idea.
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