Recent content by Edwardy

I need to calculate fluke. Why do I in the first picture, when calculating the height, subract a from r, while in the other one, I subract r from a? What does that depend on? *I didn't translate the text because it is long and would take me a lot of time to do, but I will do it if it's neceserry.

Thank you, I have one more question though. From my understanding, we are not thinking of Fa as a vector here (hence the arrow above it is missing), so why wouldn't Fa be negative itself? It would have both negative coordinates?

I am here to learn more physics.