An Experiment to measure the acceleration due to gravity

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8 Terms

1
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Draw a diagram of the apparatus

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2
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Step 1

Set up apparatus as shown, with the length of the string set at 1m, measured from from the bottom of the cork to the middle of the weight

3
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Step 2

Set the pendulum swinging non-elliptically through an arc of <15 degrees. Measure time taken for 25 oscillations

4
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Step 3

Hence calculate the periodic time (Τ) which is the time for one oscillation

5
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Step 4

Reduce length of pendulum by 10cm and repeat steps 1-3

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Step 5

Repeat step 4, four more times

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Step 6

Plot a graph of l vs. T2 and find its slope

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Step 7

Multiply the slope by 4π squared to find the acceleration due to gravity