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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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- Fall '11