Hello All, I was performing an experiment in which the perod of oscllation of a pendulun at different lengths is measured using a light gate. while performing the experiment i noticed that the string was slightly elastic, differing from the perfect pendulum. I was attempting to figure outwhat kind of impact this may have had. On my T^2 (s^2) vs l (m) graph the errors I could identify where the folliwng: the linear regression has a y intercept of -0.04. Small but present. So all Periods where recorded slightly too low or all lengrhs slightly to small the slope is slightly to high at 4.0769, which yields a value gor g of around 9.7 ms^-2 instead of 9.8. Perfect slope would be 4.028 And ofc there was some random error on each data point. But i am not able to research how a slight elasticity in the cord would affect the results. Any ideas?