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Homework Statement
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?
Homework Equations
m1v1+m2v2=m1v1+m2v2
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!