In unit 3 Physics, significant figures are causing me more stress than any of the actual content.
By this, I don't mean how sig figs work, rather, how to use them in a multi-part question. For example, in part a, I will have to round off my answer to 2 significant figures and then I will have to use this answer in part b.
The problem is, I will get a different answer depending on if I used the correctly rounded value or the exact value from part a and it feels like the answer in the textbook questions has always used the other method to what I did, and my answer comes out wrong. It just feels like there is no consistency whatsoever when using sig figs and it's really frustrating.
Can anyone tell me how I should be approaching these types of questions?
In the exam, do they accept multiple answers depending on how many sig figs I used for the value from the prior question, or do they only accept the one answer?
Thanks