Wasn't exactly sure where I should put this question. It is from my phys class but is just about figuring error. This is for a lab that used a spark timer, tape and toy car to measure velocity/accel/distance.(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

I have a set of calipers with +-0.025mm error. I used these calipers to measure about 180 positions on the spark tape ranging from 0.05mm to 18mm and a total of 1883.8mm. The question is how should I do the overall error? I realize that from one point to the next its the 0.025 but what about overall length?

2. Relevant equations

3. The attempt at a solution

Simply adding the max error I find a +-5mm but this seems excessive, especially if I use a ruler to check the overall length.

Thanks for help/information

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# Homework Help: % error over many, many measurments

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