1. The problem statement, all variables and given/known data I need to work out g for a pendulum. I have values for length (l) and time (T^2) 2. Relevant equations T= 2 pi sqroot (l/g) 3. The attempt at a solution I have plotted a graph of T^2 against l found the gradient of the line is this the value for g or if not do I need to rearrange the equation making g the subject ? I am not too strong on algerbra and I came up with g = l / (T^2 / 2 pi^2) but this gives me a silly small amount for g. the gradient of my graph is 16 which is also a little high for g?