Often, physicists will report a measured number with a “standard” uncertainty and indicate that there is a 68% that the true value lies within the range covered by the uncertainty. Newton’s Univer...Often, physicists will report a measured number with a “standard” uncertainty and indicate that there is a 68% that the true value lies within the range covered by the uncertainty. Newton’s Universal Theory of gravity predicts that the distance, x, covered by an object that has fallen for a length of time, t, is given by: Determine the value of g (with uncertainty) by performing an experiment that will allow you to determine g by determining the slope of a line of best fit.