1. "A small ball of mass 1.06 is attached to each end of a thin steel rod of length 1.2 m and mass 6.4kg. The rod is constrained to rotate in the horizontal plane about a vertical axis through its midpoint. At some instant, it is observed to rotate with an angular velocity of 30 rev / s. Due to friction, it comes to rest 32 seconds later. Assuming a constant frictional torque, compute the retarding torque exerted by friction. 2. First I converted the initial angular velocity to rad/s which is 188.4 rad/s I computed the angular acceleration to be -5.89 rad/s2 we know the final angular velocity is 0 I THOUGHT i could do torque,net = I*angular acceleration and assume that friction is the only torque thats making it slow down ?? I'm so confused.. I think I is (1/3)M,rod*L^2 any help or suggestions would be greatly appreciated.