Amplitude
OLD
Amplitude is the maximum value of displacement. While describing simple harmonic motion (SHM), we mentioned that energy of a system executing SHM alternates between kinetic and potential forms. At the extremities of the oscillation, which are also called the turning points, the kinetic energy is zero and the potential energy is maximum.
(Garg S., Ghosh C.K., Gupta S., Oscillations and Waves, page 42)
OLD
Amplitude is the maximum value of displacement. While describing simple harmonic motion (SHM), we mentioned that energy of a system executing SHM alternates between kinetic and potential forms. At the extremities of the oscillation, which are also called the turning points, the kinetic energy is zero and the potential energy is maximum.
(Garg S., Ghosh C.K., Gupta S., Oscillations and Waves, page 42)
NEW(BETTER)
The
horizontal dashed line in figure represents the position of the string when no
wave is present. The maximum distance the string moves above or below this
equilibrium value is called amplitude A of the wave.
(College
Physics; Raymond A. Serway, Jerry S. Fraughn, Chris Vuille, pg. 458)
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