1. The problem statement, all variables and given/known data A 240g ball and a 570g ball are connected by a 48.0-cm-long massless, rigid rod. The structure rotates about its center of mass at 110 rpm. 2. Relevant equations KE = Iω^2 I = 1/12(mr^2) 3. The attempt at a solution Since it has two masses and two different radius, I was not sure with what I should've done.