In my physics class we did an experiment where we timed the oscillations of a lead bob when swung from a small angular displacement and were asked to find the relationship between oscillation time (period) and string length. We were given 4 possible equations and asked to find the right one and I know it is this one "T(adsbygoogle = window.adsbygoogle || []).push({}); ^{2}= Al" because the teacher told us but I'm completely lost.

Heres some of my results taken

Length/m---------Time for 30 oscillations /s

85-----------56.4

72-----------81.9

63-----------48.2

52------------43.9

36-----------36.8

A in the formula was defined as 4pi^{2}/g.

We were told to "Examine the data and select the relationship that best fits the experimental data. Plot the appropriate graph of the quantities involved. A straight line graph through the origin confirms that you have selected the appropriate relationship."

I'm not quite sure what values to plot this graph with. I tried drawing a graph with T^{2}as X and Al as Y but I don't know what the origin he's talking about is.

I have to write a report on this experiment but I dont really know whats going on so Im stuck.

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# Pendulum Experiment - Finding relationship between period and length

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