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    Any one have any idea how to find the force of gravity from a graph of T^2 over Length on the pendulum required practical not the one with the spring though
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    (Original post by ellster2000)
    Any one have any idea how to find the force of gravity from a graph of T^2 over Length on the pendulum required practical not the one with the spring though
    For a simple pendulum, the time period, T, is equal to:

    T=2\pi\sqrt\dfrac{l}{g}

    Rearranging this gives:

    T^2=\dfrac{4\pi^2 l}{g}

    And then:

    \dfrac{T^2}{l} =\dfrac{4\pi^2}{g}

    Therefore:

    g=\dfrac{4\pi^2}{\text{gradient}  }

    Hope that helps!
 
 
 
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