A track is mounted on a large wheel that is free to turn with negligible friction about a vertical axis (the gure}. A toy train of mass m is placed on the track and, with the system initially at rest, the train's electrical power is turned on. The train reaches a steady speed of 0.112 m/s with respect to the track. What is the angular speed of the wheel if its mass is 1.42m and its radius is 0.616 m? (Treat the wheel as a hoop, and neglect the mass of the spokes and hub.) Number i 0.13 Units