Procedure Part 2: ' Next, we want to measure gravity. We do this in the following manor: Create a new column in your Excel sheet titled, 'Period Squared'. From your measured period values, create a formula that squares the value. Plot the square of the period vs. the length (this means length on xaxis and square of the period on the yaxis.) 0 If the equation for the period is squared, we obtain Procedure Part2 Continued: We slightly rearrange this equation to obtain - This now has the form y=mx+b, except b is zero. - From your plot, fit the data with a linear trendline. Add the equation to the chart and record the slope. The slope should equal4 ?. Set the slope equal to this equation and solve for g. G4 X V fx A B C D E F G H I J K L M N P Q W N Length (m) Time(10cycles) Period (time of 1 cycle Predicted Period % Error Period Squared 0.885 19.20 1.92 1.85 3.64% 0.785 18.4 1.84 1.77 3.80% 0.673 16.75 1.68 1.65 1.19% 0.573 15.48 1.55 1.51 1.94% 0.495 14.48 1.45 1.41 2.08% 0.41 13.31 1.33 1.28 3.75% 10 0.328 11.93 1.19 1.14 4.20% 11 12 13 14 15 16 17 18 19