1. The problem statement, all variables and given/known data Consider a pulley with a mass-less cord attached to its edge. The rope hangs a distance of d= 2.50 m below the bottom of the pulley. Attached to the end of this cord is a block with mass 3.00 kg. There is also an electric motor attached to the pulley which supplies a torque of 28.7 N * m. The pulley can be considered a disk with a radius of 0.65 m. a) What is the torque due to the hanging block? b) what is the moment of inertia of the pulley? c) Once the motor is turned on the pulley begins to rotate counter clock-wise. What is the magnitude of the angular acceleration of the pulley? 2. Relevant equations I = 0.5 * m * r^2 (moment of inertia) 3. The attempt at a solution a) Torque= m*g*d ---> Torque = 3.00 * 9.80 * 2.50 = 73.5 N * m b) I'm stuck on how to find the moment of inertia here because no mass was given for the pulley itself.