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ehrenfest
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Homework Statement
The book I am using (Zwiebach on page 66) uses the expression
[tex] dF_v = T_0 \frac{ \partial{y}}{\partial{x}} |_{x+dx} -T_0 \frac{ \partial{y}}{\partial{x}} |_{x} [/tex]
for the force on an infinitesimal length of string. We assume dy/dx is much less than 1. I am not sure how the author got these expressions for the tension at x and x+dx? Is he using a Taylor series approximation?
Homework Equations
The Attempt at a Solution
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