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996gt2
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Homework Statement
The figure shows two masses hanging from a steel wire. The mass of the wire is 60.0 g. A wave pulse travels along the wire from point 1 to point 2 in 24.0 ms.
What is mass m?
Homework Equations
The Attempt at a Solution
L=8.0m
[tex]m_{string}=60g=0.06kg[/tex]
[tex]
\mu=m_{string}/L=0.0075 kg/m
[/tex]
[tex]v=4.0m/24ms=166.667m/s[/tex]
[tex]v=\sqrt{T/\mu}=\sqrt{T/0.0075kg/m}[/tex]
[tex]T=\sqrt{(2mgsin\theta)^2+(2mgcos\theta)^2)[/tex]
Using [tex]\theta=40 degrees[/tex], I got m to be 10.6 kg. However, this answer is wrong. Can anyone tell me where I made the mistake? Thanks!