1. The problem statement, all variables and given/known data You have an inertia of 52 kg and are standing at rest on an iced-over pond in your skates. Suddenly, your 60-kg brother skates in from the right with x component of velocity -4.9 m/s and collides elastically with you. 1. What is the siblings' relative speed after the collision? 2. Relevant equations m1v1+m2v2=m1v1+m2v2 3. The attempt at a solution This is part of my assignment online, and it when I plug in 4.55 m/s it says my answer is incorrect. I'm lost at this point. Thanks in advance!