but you dont change when you stretch a rope you

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Unformatted text preview: ece you have left (less rope!), but you don’t change μ. When you stretch a rope, you change μ but not m. 32 33 Forces on a Bit of String To figure out the vertical components F1y and F2y, remember that the tension F1 and F2 must point along the string at that point. Consider a bit of string of length Δx at position x. Its mass is μΔx, and its displacement is y(x, t). The tension in the string pulls on each end of the bit with forces of slightly different magnitudes and directions, since the string is curved. • The horizontal components of F1 and F2 must be the same...
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