The document contains 4 rotational motion problems involving the calculation of torque: 1) A 54 kg bucket hanging from a cylinder produces a torque of 26.5 Nm. 2) A wheel with forces of 15N and 10N at different radii produces a net torque of -2.80 Nm. 3) A crane arm at a 20 degree angle can withstand 6342.9 Nm of torque, allowing a 450N load. At a 40 degree angle its maximum load is 551.6N. 4) A fishing pole experiencing a 100N force at a 20 degree angle has a torque of 68.4 Nm.