Resonance And Its Effects

Description
If you want to see sound waves breaking a wine glass then watch this video. The lecture discusses damped oscillation for a spring where we apply a force apart from its spring force.The differential equation is written and solved using complex number.The steady state solution is obtained. In resonance, the amplitude vs angular frequency and phase difference vs angular frequency graph is discussed. The motion of a pendulum whose point of suspension moves with time is analysed.The theoretical discussion is followed by live demonstration.Breaking of a bridge , marching soldiers etc are cited as example of destructive resonance.The last few minutes shows an incredible experiment

Prof. Walter Lewin, 8.03 Physics III: Vibrations and Waves, Massachusetts Institute of Technology: MIT OpenCourseWare),http://ocw.mit.edu (Accessed June 30, 2011). License: Creative Commons BY-NC-SA: http://ocw.mit.edu/terms/#cc