ENERGY DISSIPATION AND WAVE MOTION
The energy supplied at a point of disturbance is transmitted to adjacent particles by the forces between the particles. If there is internal friction or damping, the energy travels away from the point in the form of a pulse. If the pulse continues to travel in direction, like a ripple on a piece of rope, each particle in its path will, in turn, assume the movement of the original particle as shown in Fig. 1.8.
If the external friction is considered, the kinetic energy of the pulse will be converted to heat in a short distance, Fig. 1.9.
Fig. 1.8 A single pulse travels away from a of source energy. The pulse ...
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