Easy problem that i dont understand

[nemzy]

At t = 0, a transverse wave pulse in a wire is described by the following function where x and y are in meters.

y=6/(x^2+3)


Write the function y(x, t) that describes this wave if it is traveling in the positive x direction with a speed of 2.50 m/s.

all i know that in the positive x direction f(x-vt) is the wavelength...but how is this relevant to this question?

i have no idea how to solve this

 

[ehild]

At t = 0, a transverse wave pulse in a wire is described by the following function where x and y are in meters.

y=6/(x^2+3)


Write the function y(x, t) that describes this wave if it is traveling in the positive x direction with a speed of 2.50 m/s.

all i know that in the positive x direction f(x-vt) is the wavelength...but how is this relevant to this question?

i have no idea how to solve this

You know wrong: f(x-tv) is not the wavelength. A wave traveling in the positive x direction is represented by a function f(x-vt).

Your y(x) function is the same as this f(x,t) at t=0.

ehild

 

[nrqed]

At t = 0, a transverse wave pulse in a wire is described by the following function where x and y are in meters.

y=6/(x^2+3)


Write the function y(x, t) that describes this wave if it is traveling in the positive x direction with a speed of 2.50 m/s.

all i know that in the positive x direction f(x-vt) is the wavelength...but how is this relevant to this question?

i have no idea how to solve this

You have all the elements of the answer.
A wave traveling to the right at a speed v is obtained from the shape of the wave at t=0 by replacing x by x-vt. So simply replace x by (x-2.50 t) in your function and you get the function at any time. That's all.

Pat

 

[nemzy]

thanks answer is right