1. The problem statement, all variables and given/known data A 70kg man who is ice skating north collides with a 30kg boy who is ice skating west. Immediately after the collision, the man and boy are observed to be moving together with a velocity of 2m/s in a direction 37 degrees north of west. What was the magnitude of the boy's velocity before collision. 2. Relevant equations 3. The attempt at a solution I do not really know where to start. Could someone please list equations that are needed for this problem.