Time (seconds) Distance rolled (cm) 1 2 3 avg uncert ------------------------------------------------------------------- 0.5 +/- 0.005 6.9 7.1 7.0 7.0 +/- 0.1 1.0 +/- 0.005 25.0 25.5 24.9 25.1 +/- 0.3 1.5 +/- 0.005 58.3 58.0 58.4 58.2 +/- 0.2 2.0 +/- 0.005 100.9 101.3 101.1 101.1 +/- 0.2 2.5 +/- 0.005 157.9 157.4 157.4 157.6 +/- 0.3 3.0 +/- 0.005 230.1 230.0 230.1 230.2 +/- 0.3 3.5 +/- 0.005 315.7 315.6 315.3 315.5 +/- 0.2 -------------------------------------------------------------------