1. The problem statement, all variables and given/known data a small puck of mass .5kg is executing Uniform constant motion on a friction free horizontal table. The angular frequency of the puck is 10 sec-1 (counter clockwise) and the radius of the circular motion is .8m. the radius stays fixed as the student holds the string in place. he now pulls the string down .5 m and holds it again in place. what work did he do? 2. Relevant equations KE(original)+ W = KE (final) inertia of hockey puck on string = mr2 w = angular velocity I = inertia 3. The attempt at a solution KE(original)+ W = KE (final) .5(I)w2 +W = KE final .5 (.5)(.8)2(102) + W = KE final now i have a problem solving for kinetic energy final... KE final = .5(.5)(.5)2(102)(w2) I cant figure out what w (angular velocity) is... please help!!!