1. The problem statement, all variables and given/known data Four 60 kg skaters join hands and skate down an ice rink at 4.6 m/s. Side by side, they form a line 6 m long. The skater at one end stops abruptly, and the line proceeds to rotate rigidly about that skater. Find the linear speed of the outermost skater. 3. The attempt at a solution What I did was equate the initial kinetic with the final rotational energy. This does not jive with the answer and the solutions say to use conservation of angular momentum. Why isn't energy conserved?