1. The problem statement, all variables and given/known data a 470 g firework is traveling straight up at 13 m/s when it explodes into two pieces. The smaller piece (150 g ) shoots off horizontally towards the East at 20 m/s. Find the speed and direction of the other piece directly after the explosion. 2. Relevant equations p=mv pbefore collision = pafter collision 3. The attempt at a solution I first found the mass of the 2nd piece by using mass of whole firework (470g) and the mass of small piece (150g). mt=ms+m2 = 320g = 0.32kg then i did pt= p1 + p2 mtvt = m1v1 + m2v2---> solve for v2 0.47kg(13m/s) = 0.15kg(20m/s) + 0.32kg(v2) v2= 9.7 m/s but now i am not sure if i did this right i feel i am missing a step or 2! please help!!