Question: A toy train is initially at rest on a track fastened to a bicycle wheel, which is free to rotate. How does the wheel respond

A toy train is initially at rest on a track fastened to a bicycle wheel, which is free to rotate. How does the wheel respond when the train moves clockwise? When the train backs up? Does the angular momentum of the wheel-train system change during these maneuvers? How would the resulting motions be affected if the train were much more massive than the track? Or vice versa?

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