Specifically, introductory textbooks say that the elastic potential energy is quadratic in the slope of the string [1]. Recalling that the wave’s speed v = dx/ dt, we see that the potential and kinetic energy densities are equal.
Specifically, introductory textbooks say that the elastic potential energy is quadratic in the slope of the string [1]. Recalling that the wave’s speed v = dx/ dt, we see that the potential and kinetic energy densities are equal.