As an avid cyclist, I found this interactive article explaining the physics of a bicycle very engaging. hjat makes the article work are the animations using simple force diagrams to explain how and why "the simple action of pedaling to move forward and turning the handlebars to steer makes bike riding an effortless activity" (I wouldn't say effortless but I get the point). The article draws you in with deeper and deeper explanations, including especially the detailedaccount of why spokes are designed the way they are. As a rider, most of the effects were familiar to me (for example, the mechanics of tightening the spokes) but understanding the physics behind that adds to my ability to do the task. Via Gerald Ardito.
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