# The hanging mass was dropped five different times

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rod at equal distances from the center of the system. The hanging mass was dropped five different times; each time with a different radius (16, 14, 12, 10, and 8 cm). We calculated the total moment of inertia for each trial. Using the total moment of inertia, we then subtracted the value of I 0 from the total to find the moment of inertia for the slotted
masses at each distance. We also calculated the theoretical moment of inertia for the slotted mass at each distance. We compared the value of experimental moment of inertia to the value of theoretical moment of inertia by taking the percent error for each distance. Our percent errors were somewhat high. This could be due to the fact that air resistance was not taken into account and it could have effected the acceleration of the hanging mass. Also, the friction of the rope sliding down the pulley and the rope on the rod could have effected the acceleration as well. Furthermore, the rope may not have been uniformly wound around the rod and caused the acceleration to be different from what is expected. Question 4 proved to us that the alternative method of using R as the radius of the disk and L as the thickness of the disk agreed better with the experiment. The experimental errors for all trials were significantly lower than our own experimental errors.
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