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A Wilberforce pendulum, invented by British physicist Lionel Robert Wilberforce around 1896, consists of a mass suspended by a long helical spring and free to turn on its vertical axis, twisting the spring. It is an example of a coupled mechanical oscillator, often used as a demonstration in physics education. The mass can both bob up and down on the spring, and rotate back and forth about its vertical axis with torsional vibrations. When correctly adjusted and set in motion, it exhibits a curious motion in which periods of purely rotational oscillation gradually alternate with periods of purely up and down oscillation. The energy stored in the device shifts slowly back and forth between the translational 'up and down' oscillation mode and the torsional 'clockwise and counterclockwise' osc

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  • Wilberforce-Pendel (de)
  • Pendolo di Wilberforce (it)
  • Wilberforce pendulum (en)
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  • Il pendolo di Wilberforce, inventato dal fisico britannico verso il 1896, serve per osservare trasformazioni dell'energia meccanica. (it)
  • Das Wilberforce-Pendel ist eine Kombination aus Feder- und Torsionspendel. Es besteht aus einer Masse, die an einer langen Schraubenfeder aufgehängt ist, sodass die Schraubenfeder leicht verdrillt wird wenn die Masse um ihre vertikale Achse gedreht wird. Es handelt sich um ein gekoppeltes Pendel, das in der Physikdidaktik als Beispielexperiment verwendet wird. Es wurde um 1896 vom britischen Physiker entworfen. (de)
  • A Wilberforce pendulum, invented by British physicist Lionel Robert Wilberforce around 1896, consists of a mass suspended by a long helical spring and free to turn on its vertical axis, twisting the spring. It is an example of a coupled mechanical oscillator, often used as a demonstration in physics education. The mass can both bob up and down on the spring, and rotate back and forth about its vertical axis with torsional vibrations. When correctly adjusted and set in motion, it exhibits a curious motion in which periods of purely rotational oscillation gradually alternate with periods of purely up and down oscillation. The energy stored in the device shifts slowly back and forth between the translational 'up and down' oscillation mode and the torsional 'clockwise and counterclockwise' osc (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/The_Wilberforce_Pendulum.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Wilberforce_pendulum.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Wilberforce_pendulum_oscillation_modes.svg
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  • Das Wilberforce-Pendel ist eine Kombination aus Feder- und Torsionspendel. Es besteht aus einer Masse, die an einer langen Schraubenfeder aufgehängt ist, sodass die Schraubenfeder leicht verdrillt wird wenn die Masse um ihre vertikale Achse gedreht wird. Es handelt sich um ein gekoppeltes Pendel, das in der Physikdidaktik als Beispielexperiment verwendet wird. Es wurde um 1896 vom britischen Physiker entworfen. Die Masse an der Feder kann sowohl auf und ab schwingen, als auch wie bei einem Torsionspendel, um seine vertikale Achse hin und zurück rotieren. Mit einer bestimmten Einstellung zeigt sich eine interessante Bewegung, bei der sich ständig eine ausschließliche Rotationsschwingung und eine ausschließliche „auf und ab“ Schwingung gegenseitig ablösen. Die Energie des Pendels wird also abwechselnd von der Translationsschwingung in eine Rotationsschwingung und zurück übertragen, bis die Bewegung aufgrund der Dämpfung langsam abklingt. Trotz seines Namens, führt das Pendel bei einem normalen Betrieb keine horizontale Pendelbewegung aus, wie es bei normalen Pendeln der Fall ist. An der Masse sind meist horizontal gegenüberliegende „Arme“ angebracht, an die sich kleine Gewichte anschrauben lassen, um das Trägheitsmoment für die Torsionsschwingung anzupassen. (de)
  • A Wilberforce pendulum, invented by British physicist Lionel Robert Wilberforce around 1896, consists of a mass suspended by a long helical spring and free to turn on its vertical axis, twisting the spring. It is an example of a coupled mechanical oscillator, often used as a demonstration in physics education. The mass can both bob up and down on the spring, and rotate back and forth about its vertical axis with torsional vibrations. When correctly adjusted and set in motion, it exhibits a curious motion in which periods of purely rotational oscillation gradually alternate with periods of purely up and down oscillation. The energy stored in the device shifts slowly back and forth between the translational 'up and down' oscillation mode and the torsional 'clockwise and counterclockwise' oscillation mode, until the motion eventually dies away. Despite the name, in normal operation it does not swing back and forth as ordinary pendulums do. The mass usually has opposing pairs of radial 'arms' sticking out horizontally, threaded with small weights that can be screwed in or out to adjust the moment of inertia to 'tune' the torsional vibration period. (en)
  • Il pendolo di Wilberforce, inventato dal fisico britannico verso il 1896, serve per osservare trasformazioni dell'energia meccanica. (it)
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