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February 1, 2015

February 1, 2015

Posted by **diamond** on Friday, November 16, 2012 at 1:23am.

- physics -
**drwls**, Friday, November 16, 2012 at 4:32amThe wave speed is

v = 2*4*4.25/0.78 = 43.5 m/s

The mass per unit length of the cord is a = 0.04706 kg/m

The wave speed is related to tension force T by the equation

v = sqrt(T/a)

Solve for T

T = a v^2 = 89 Newtons

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