Oscilador harmónico e ressonância de ponte 
This applet represents an application illustrating aspects already considered before: the resonance that can occur on a bridge, when people walking at a cadenced pace pass over it.
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The graphic arrangement of this example evokes something that happened in April 1931, on the bridge D. Luís I – linking Porto to V. N. Gaia – at the funeral of a medical student, who had died while being pursued by the police.
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Translated for Atractor by Gabriela Chaves, from its original version in Portuguese. Atractor is grateful for her cooperation.
