WAVES AND OSCILLATIONS - OSCILLATIONS - NON-LINEAR SYSTEMS NC State University Faculty Access

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Pump a Swing
# 3A95.70


Description: Give the pendulum an initial swing. When it reaches the equilibrium point, pull down on the string. The amplitude will increase.

Instructions:

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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