1. The problem statement, all variables and given/known data A bomb that is originally at rest blows apart into three pieces of equal mass. Two of the pieces have velocities (12i + 24j) m/s and (30i - 24j) m/s. What is the speed of the third piece? 2. Relevant equations m1v1 + m2v2 + m3v3 = 3mv4 (assuming m is the same) 3. The attempt at a solution Not really sure where to begin. I can find the speed of the 2 objects by finding the k direction, but thats it.