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Nov17-09, 07:50 PM
1. The problem statement, all variables and given/known data
A string of length l = 5 m weighs M = 10 kg . A pulse wave is traveling along the string. What is the speed v of the crest of the pulse, in the uint of m/s , if the tension of the string F is 200 N ?
2. Relevant equations
v= sqrt F/u
HELP: We can obtain an expression for the wave speed by analyzing the forces acting a string of length l and mass M. Do you recall the resulting relation between the speed of the wave and the tension and the linear density?
HELP: ....Get the density by defination and then use above equation.
3. The attempt at a solution
I tried importing the numbers into the equation what I thought was the equation the HELP statement suggested.. and i got
v=sqrt 200/(10/15) = 17.320 ... is there something else i should be doing because this answer was wrong but i thought for sure i was doing it correct.
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