1. The problem statement, all variables and given/known data A golf ball of mass 0.045 kg is moving in the +x-direction with a speed of 6.10 m/s, and a baseball of mass 0.145 kg is moving in the -y-direction with a speed of 2.20 m/s. What are the magnitude and direction of the total momentum of the system consisting of the two balls? _________kg·m/s _________° (from the +x axis) 2. Relevant equations P=mv and I'm not sure what else... 3. The attempt at a solution My teacher said that we should be able to teach ourselves momentum, so as one might be able to tell, I'm not sure where to start. I tried doing (.045x6.1) + (.145x2.2) = P, but that didn't work. How should I start? Are there other equations I should know? Thank you so much for your help!