In the first video lecture, I am confused about how to calculate the uncertainty measurement in the second and third examples for the apple-dropping experiment. In the first example, you add .003 m to 3.0 m and subtract .003 m from 1.5 m. When you take the ratio of the results, you get 2.006. So, the uncertainty is .006. I get that. However, I'm confused about the second and third calculations. Using the same process, how do you get .002 and .008?

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