WAVES AND OSCILLATIONS - OSCILLATIONS - NON-LINEAR SYSTEMS	Order
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Description: Give the pendulum an initial swing. When it reaches the equilibrium point, pull down on the string. The amplitude will increase. Purchased/Built: built Setup Time: 5 min Quant. in Demo Room: 1 Demo References The Video Encyclopedia of Physics Demonstrations Disc 09-04 Periodically pull on the string of a pendulum. Sutton M-182 Diagram. A electromagnet on a swing allows one to raise and lower the center of mass by a switch. Sutton M-181 Work up a swing by pulling on the cord at the right time. Meiners 15-1.15 A ball on a string hangs over a pulley. Increase the amplitude by pulling on the string periodically.
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