1. The problem statement, all variables and given/known data a 600 kg canon, initially at rest, exploded upon firing and broke in to three fragments. One fragment of mass of 200 kg travelled east at 40m/s and a second fragment of mass 300 kg travelled due south at 20 m/s. What was the velocity of the third fragment? 2. Relevant equations sum of P = sum of P' 0= P1 + P2 + P3 3. The attempt at a solution I'm not sure whether I'm supposed to use trig or something to find the missing velocity. Any help would be GREATLY appreciated.