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# physics, mechanics, resonance, spring, harmonic, oscillation
It makes a difference to read about resonance and to feel it for yourself. Grant your students this haptic experience. It will come in handy whenever you use springs to model more complex systems.
# physics, mechanics, vibration, resonance, earthquakes
Mechanical systems, be it a tiny clockwork or a skyscraper, have a resonance frequency that depends on stiffness, mass and other parameters. Paper loops of different sizes build a simple and safe model to get a feeling for this ubiquitous phenomena.