1. The problem statement, all variables and given/known data An object explodes into 3 equal masses. One mass moves east at a velocity of 15.0 m/s . If a second mass moves at a velocity of 10.0 m/s 45degrees south of east. What is the velocity of the 3rd object 2. Relevant equations I know m1 = m2 = m3 therefore we have just M 3. The attempt at a solution I have no idea where to start ..... can anyone help me get started at least??