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

A 1.50-m-long string is under 30.0 N of tension. A pulse travels the length of the string in 50.0 ms.

2. Relevant equations

v of string = sq rt of (Tension of string/ string's mass-to-length ratio)

string's mass to length ratio= m/L

3. The attempt at a solution

So, the pulse takes 50.0 ms to travel through 1.5 m of string. So, the velocity of the pulse is 1.5 m/.050 s.

V= 1.5/.050 = 30 m/s

Now that I know the velocity, I can use the V of string equation.

V[tex]^{2}[/tex]= T/[tex]\mu[/tex]

[tex]\mu[/tex]= T/V[tex]^{2}[/tex]

[tex]\mu[/tex]= 30.0N/ (30m/s)[tex]^{2}[/tex]

[tex]\mu[/tex]=.033

[tex]\mu[/tex]=m/L

[tex]\mu[/tex]*L=m

.033*1.5=m

m=.049995 or .05 g

However, master physics disagrees with this answer. What am I doing incorrectly?

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# Homework Help: Mass of a String

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