Mass of Car 0.0386 .2m .3m .4m .5m .6m .7m Speed (m/s) 1.593291405 1.981478391 2.269550987 2.714285714 3.333281655 3.643944273 1.54713048 2.004896167 2.275394601 2.713665448 3.354134165 3.668691557 1.594601853 2.005234718 2.324898439 2.697637438 3.44 3.628814475 1.538710722 1.968993533 2.323647393 2.656005368 3.34640767 3.724878725 1.570871089 1.917797158 2.3905385 2.681797651 3.335608787 3.717150761 1.548656337 1.965408805 2.330259027 2.648009812 3.320360761 3.771400505 1.551020408 1.956342669 2.332547633 2.675754845 3.333540065 3.772459293 1.545016914 1.904265555 2.296017015 2.641824249 3.315445349 3.657457812 1.55707074 2.106990774 2.338519102 2.657194003 3.411398832 3.663440567 1.563734527 2.005234718 2.387894631 2.691523119 3.304032456 3.703831312 Average (m/s) 1.561010448 1.981664249 2.326926733 2.677769765 3.349420974 3.695206928 Potential Energy (mgh) (J) 0.075656 0.113484 0.151312 0.18914 0.226968 0.264796 Kinetic Energy (J) 0.047029345 0.075790969 0.104501549 0.138389703 0.216519383 0.263532897 Energy Lost 0.028626655 0.037693031 0.046810451 0.050750297 0.010448617 0.001263103 Percent of Energy Lost 37.84% 33.21% 30.94% 26.83% 4.60% 0.48%