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To stand or to travel, part deux

The velocity of a transverse wave on an infinitely long string is $ c$. At $ t = 0$ the string has shape given by $ \displaystyle y(x,t=0) =
-\frac{V_{\scriptscriptstyle 0}}{c k} \cos\left(kx + \frac{2\pi}{3}\right)$ and velocity distribution $ \displaystyle v_y(x,t=0) = V_{\scriptscriptstyle 0}\sin\left(kx +
\frac{2\pi}{3}\right)$ where $ A$ is a constant.

(a)
Find the particular solution $ y(x,t)$ to the wave equation for the string consistent with the above initial conditions.

(b)
Does the solution found in (a) represent a traveling wave, a standing wave, or neither? Explain. If a traveling wave, in what direction is it moving?



Tomas Arias 2003-10-15