How Do Tension and Distance Affect Pulse Travel Time in a Stretched Cord?

AI Thread Summary
The discussion focuses on calculating the time it takes for a pulse to travel along a stretched cord with a mass of 0.65 kg and a tension of 150 N, stretched between two supports 28 m apart. The relevant equation for wave speed in the cord is v = √(T/μ), where μ represents the mass per unit length. Participants clarify that the mass per unit length can be calculated as 0.65 kg divided by 28 m. Once the wave speed is determined, the time can be calculated using the formula time = distance/speed. This approach effectively combines tension and distance to find the pulse travel time.
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Homework Statement


a cord of mass 0.65 Kg is stretched between two supports 28 m apart, The tension of the cord is 150 N, how long will it take a pulse to go from one end to the other?


Homework Equations


ok, so I really know is: speed of wave=frequency*wavelength...


The Attempt at a Solution


I really have no clue, I know the distance, with the speed I can solve for frequency, but I don't know how to find time elapsed... can anyone help me, I have no clue how to use tension in this problem!
 
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the speed of a wave traveling through the string would be

v=\sqrt{\frac{T}{\mu}}

where \mu is the mass per unit length
 
oh, cool, yeah i remember seeing that equation somewhere before... right so:
v= (150/(0.65Kg/28m))^.5

take that number, given the length of the cord I can solve for time
 
That should work,yes
 

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