1-7 Energy and power of a traveling wave on a string
Kinetic and elastic potential energies in a wave traveling on a
string
Consider the energy of a small element of the string
Elastic potential energy
The elastic potential energy of this element increases because it is stretched
more by the wave.
Kinetic energy
This element has kinetic energy because it is moving transversely with speed
u.
A wave transports energy in the form of kinetic energy and elastic potential
energy.