1. The problem statement, all variables and given/known data A mass(1) of 10000kg with a velocity 30m/s west collides with another mass(2) of 1200kg with a velocity 20m/s north. After the collision the two masses stick together. Determine the change in momentum of mass(2) before and after the collision. 2. Relevant equations General momentum equations: p = mv Δp = pf - pi 3. The attempt at a solution pi (mass 2) = mv = 1200 * 20 = 24000sN North final velocity was calculated to be 26.87m/s 274.6°T (using LCM and some trig) Therefore, pf (mass 2) = 1200 * 26.87 = 32244sN 274.6°T to calculate change in momentum: Δp = pf - pi Δp = (32244sN 274.6°T) + (24000sN South)Note, changed to from North to south as it was -pi Using a vector diagram, I found the resultant vector, Δp, to be 38621sN 226.7°T. I am not sure that I am doing this right though. After some searching on the internet, some people calculated change in momentum by adding initial and final vectors. But isn't that just net momentum? please help!