1. The problem statement, all variables and given/known data A car's velocity changes from 13.9 m/s east to 12.8 m/s northeast. What is the change in it's velocity? It's a 4 marker. 2. Relevant equations 3. The attempt at a solution Honestly, I don't really know how to start this. I know it's a vector difference and I've drawn the diagram which isn't too tough. The fact that I'm using a negative vector is throwing me off. Could anyone nudge me in the right direction?