spacecraft that are linked together are then thrust apart by large springs, S1 has a mass of 1.9x10^4 kg, then has a velocity of 3.5x10^3km/h at 5.1 degrees to the original direction.. S2 has a mass of 1.7x10^4kg and a velocity of 3.4x10^3km/h at 5.9 degrees to the original direction. I just want to double check to make sure I solved this correctly. 3. I converted km/h into m/s. Then I calculated each spaceships momentum using P=mv and resolved each spaceship into its own component vector. I figured the X in each component vector would add up to the original total momentum of the 2 spaceships when they were linked together, because Pt = P1+P2 I solved each x compenent using X=Pcos(theta) then I added them together to get the total momentum. I also added the mass of the two spaceships together to get the total mass when they were linked together. Using both of these values I used P=mv to calculate the original velocity of the two spaceships when they were linked together. I'm not worried about any math errors, just the errors in any steps that I took. Thanks a lot.