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Tension in a spring that's bent into a semicircle
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[QUOTE="phantomvommand, post: 6853779, member: 687416"] Are you suggesting that the diameter of the semicircle is (D + 2L/pi)? I think I need help with understanding how a vertical tension in the string even arises. It is obvious intuitively, but when I break the spring down into an infinitesimal element I cannot figure out why. Considering the small element of the spring where the string is attached to, it experiences a leftward spring / tension force, and a downward tension force from the string. Yet, it is in equilibrium. Presumably, the leftward tension is balanced by some rightward friction with the string? But how about the downward tension force? What gives rise to a necessary upward force which the downward string tension must balance? If my method of analysis above is incorrect, I'd be happy to hear how else the tension in the string arises. [/QUOTE]
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Tension in a spring that's bent into a semicircle
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