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Word Count: 274
The result of the experiment is 974 ms2 which is 06 less than the theoretical acceleration value of 98 ms2 Our result are accurate because time intervals are 160 s which gives us more dots on the sheet The more data points time intervals we have the more accurate are the measurements We also used a caliper which provided good measurements of distances between the dots Also the appartus was set up corretly on a flat floor and the falling object has a cylindrical shape and heavy weight designed to minimize contact with air and therefore to minimize air friction If we took fewer data points our measurement wouldnt be as accurate while with more data points it would give us an almost exact acceleration as theoretical And thats because more data points give better graph so when we calculate the slope it gives us accurate result In calculating uncertainties by brute force method after we added and substracted 005 to all of our Dys the acceleration didnt change because the slope didnt change although the graph of the acceleration changed position vertically When we alternated signs the acceleration decreased and error increased Thats because the points of the graph are further away from the original line which makes approximation less accurate And finally when we added 005 to first five values of Dys and substracted 005 from the 5 others the acceleration changed because of the change of the slope of the best straight line passing through the points Therefore acceleration decreased and error increased Air friction was minimized because of the shape and weight of the falling object that make it faster and less exposed to air contact
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