1. The problem statement, all variables and given/known data Given the initial (u) and final (v) velocities below, find the magnitude and direction of the changes in velocity: 2. Relevant equations (a) through (f) - I only have trouble with (e) and (f) (e): u = 10ms east, v = 15ms N40°W (f): u = 250ms N20°W, v = 200ms south 3. The attempt at a solution http://dl.dropbox.com/u/14178839/img026.pdf [Broken] As you can see, I'm trying to use trigonometry to solve the problems. I think I'm doing something wrong because the textbook answers are not matching up with the answers I have been getting. Probably what I'd like is someone to walk me through at least one of the questions, maybe link me to relevant tutorials, and then see if I can figure out the other one. I've been trying to figure this out on my own for about 5 hours now, and finally decided to just post up my problem on these forums. Thanks for any and all assistance.