Physics

Problem

2.0\,\text{kg}

puck travels at

6.0\,\text{m/s}

on an ice rink and collides elastically with a

1.0\,\text{kg}

puck that is initially at rest. The second puck then collides and sticks to a

3.0\,\text{kg}

puck that was also at rest. Determine the percentage of the original kinetic energy of the

2.0\,\text{kg}

puck that is lost by the time all collisions are complete.