Calculating Wave Speed for a 6m Rope with 7kg Mass and 140 N Force

[freeofwork]

Homework Statement

A 6m length of rope has a mass of 7kg. It is pulled taut with a force of 140 N. What is the speed of the wave for the rope?

Homework Equations

i have no idea...
v=λf
L=λ/2

The Attempt at a Solution

I have no idea if I have the right formulas...

 

[NascentOxygen]

Can you post the full question? In summarizing the details from your textbook, you have omitted essential information.

 

[freeofwork]

That is the whole question... I may have missed some formulas during class however.

 

[technician]

There is an equation for the speed of a wave along a stretched string. It involves tension and mass information...have you met this equation?

 

[NascentOxygen]

There is an equation for the speed of a wave along a stretched string. It involves tension and mass information...have you met this equation?

Thanks to technician we call fill in what we have missed (or forgotten).

This article will fill in the gaps. http://www.sparknotes.com/testprep/books/sat2/physics/chapter17section3.rhtml

 

[freeofwork]

Yeah I kept on using that equation but it din't work. I realized at about 4am that it was actually .7kg...