1. The problem statement, all variables and given/known data Cylindrical shape pulley ( m = 6 kg, R = 0.18 m) is rotating at a frequency f = 10 s-1. Due to constant torque it stops. Calculate the work done by the breaking force. 2. Relevant equations w = 2πf 3. The attempt at a solution I can calculate the angular velocity: w = 2πf = 62.8 rad/s I don't know what to do now.