(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Two strings have been tied together with a knot and stretched between two rigit supports. The strings have linear densities µ1 = 1.4 x 10-4 kg/m and µ2 = 2.8 x 10-4 kg/m. Their lengths are L1 = 3.0m and L2 = 2.0m, and string one is under 400N tension. If a pulse is started simultaneously on each string, travelling towards the knot, which pulse reaches the knot first?

2. Relevant equations

v=√(T_s/μ)

3. The attempt at a solution

v1=√(400N/(1.4 x 10^-4 kg/m)=1690m/s)

v2=√(400N/(2.8 x 10^-4 kg/m)=1195m/s)

v1 should be faster, but I know that I'm missing something in my equations. We've been given the two lengths of the strings and the tension of only one string, so how do I utilize the value of the lengths in my formula?

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Wave speed of a string

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