I've been asked to investigate the value of g. My graph shows that the gradient is around 4.4 as when the length was 0.27m, the squared time period was 1.18s (since this is a T2 against L graph). My question is, of course, why? If I am detecting g, which is 9.81 on earth, why did I get such an odd value? I tried to see how a calculation would work with that... Since T = 2 pi * sqrt of L/g g = (4 pi2 x L) / T2 I used one of my results, where L = 0.20m, T2 = 0.904 After substituting those values into the equation I still got only 8.734 for the value of g. I need to do a write up on this and of course this is the analysis and conclusion section. Thank you for all the help you can give me.