1. The problem statement, all variables and given/known data A 3.0 kg mass sliding on a frictionless surface explodes into 3 1.0kg masses. After the explosion the velocities of the three masses are: (1) 9.0 m/s north, (2) 4.0 m/s 30 degrees south of west, and (3) 4.0 m/s south of east. What is the original spped of the 3.0 kg mass? 2. Relevant equations Pi=Pf P=mv 3. The attempt at a solution Pi=Pf 3v= (1)9+ (1)4+(1)4 I know this is wrong. I am confused about what to use for the magnitude and direction of these velocities. would it be 4tan(3) for both of them?