![]() ![]() ![]() (Note: When measuring distance, remember that distances to the left of the datum are negative, while distances to the right are positive.to discover what your numbers are hiding excel data analysis for dummies. The center of mass is 8.08 + 1 = 9.08 ft from the left end, the same answer we got before. Kinovea is a free 2d motion analysis software that can be used to measure. The center of mass is 8.08 ft from the new datum, which is 1 ft from the left end. If you pick a new datum 1 ft from the left end, you get the answer 8.08 ft for the center of mass.Our answer was 9.08 ft, so our center of mass is 9.08 ft from the datum at the left end. The way we solved it, the datum is at the left end of the seesaw.Your answer is actually correct no matter which datum you choose! You just need to remember that the datum is always at x = 0. Let's say you try it and get the answer 1.08 ft., 7.08 ft, or another number ending in ".08." This most likely happened because we chose the left end of the seesaw as the datum, while you chose the right end or some other point an integer distance from our datum. Kinovea is an open-access video analysis software and available online ( which could be explored for motion analysis (Guzmn et al., 2013 Elwardany et al., 2015). Check your datum if your answer is off by a whole number. ![]()
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