Suspend a metal ball from a fixed support using a rubber band and twist it many times around its vertical axis. When the ball is released, standing waves are formed on the rubber band. Investigate this phenomenon and study how the wave depends on relevant parameters.
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University Physics Vol. 1 Ch. 15 Oscillations, Ch. 16 Waves. https://openstax.org/details/books/university-physics-volume-1
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We have:
This creates standing waves that are visible as patterns along the rubber band.