This is a presentation I gave on AH Uncertainties for the IoP. It was the end of term and that’s why I am nearly falling asleep. I had to update it as I had indeed taken the absolute and not fractional uncertainty in T to double for the uncertainty in T2.
The above file Pendulum for uncertainties corrected is an excel sheet where you can look to see how the formulae are created to complete the analysis of your experiment. I have used an example of a simple pendulum to work out the individual uncertainty in each point. In this experiment the overall uncertainty is the uncertainty in the gradient which is found using LINEST
Updated 24th March 2026
