Ok, so I was wondering if I could get a clear explanation of why we solve relative motion problems the way we do?
so I'm given the problem where I have 2 cars, car A and Car B. Now car A is traveling at 24km/hr relative to the earth, and car B is traveling 13km/hr relative to the hr. Now everywhere I looked it tells me, to get the velocity of car A relative to Car B, you essentially subtract 13 from 24 and you have your answer. Now, where I'm confused is how the operation of subtracting the 2 vectors gives us the velocity of A with respect to B?. Essentially the explanation given from my teacher is, "Do steps 1,2 and 3 and you have your answer", however, i want to know why we do what we do to get the answer, if that makes sense.