Finding Tension in a Transverse Wave on a String

[manyo2013]

Homework Statement

A transverse pulse is propagating on a 2.0 m long string of mass 50 g. The pulse is
described by the equation:

y(x,t)=pi/(pi+(3x/2+pi(t))^2)

, with x and y in meters, and t in seconds.
Find the tension in the string.

Homework Equations

y=asin(wt+thetha)[/B]

The Attempt at a Solution

I first tried finding the amplitude of the wave, and at then I would have the displacement. After the displacement i don't know what to do. How doees this even relate to tension?

 

[Orodruin]

You are going about this the wrong way, the amplitude is completely irrelevant and your "relevant" equation is not either because it describes a sine wave and your wave is not a sine wave.

Ask yourself the following:
What is the speed of the wave?
How does the speed of the wave relate to the tension?