Some demonstrations of resonance phenomena in mechanical systems

MacLeod, A M

doi:10.1088/0031-9120/4/5/304

Cited by 4 publications

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“…In addition to the theoretical description of these systems, didactic and illustrative experiments can be performed in the classroom environ ment, providing a fairly complete description of oscillatory phenomena [2]. Regarding the damped and driven harmonic oscillator, the electro magnetic and electromechanical systems are the most versatile to work with and have many technological applications.…”

Section: Introductionmentioning

confidence: 99%

“…Regarding the damped and driven harmonic oscillator, the electro magnetic and electromechanical systems are the most versatile to work with and have many technological applications. Consequently, they are greatly explored for the teaching of forced oscillations and resonance [2][3][4]. Nowadays, technologies such as smartphone accelerometers have been widely used to study mechanical oscillators [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Manually driven harmonic oscillator

Silva¹,

Carvalho-Neto²

2020

Phys. Educ.

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Oscillations and resonance are essential topics in physics that can be explored theoretically and experimentally in the classroom or teaching laboratory environments. However, one of the main challenges concerning the experimental study of resonance phenomena via forced oscillations is the control of the oscillation frequency, which demands an electronic circuit or a fine tuned coupled mechanical system. In this work, we demonstrate that, in what concerns the physics teaching, such demanding accessories are not necessary. The forced oscillations can be implemented by the teacher's hand guided by an oscillating circle displayed in a web application loaded in a smartphone. The oscillations are applied to an ordinary spiral toy. Qualitative, as well quantitative, proposals are explored in this work with excellent results.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Manually driven harmonic oscillator

Silva¹,

Carvalho-Neto²

2020

Phys. Educ.

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“…6 NMR can be introduced using a variety of magnetic systems. Hill describes an apparatus for demonstrating magnetic resonance of a small bar magnet in a static magnetic field with an oscillating field (provided by an audio-frequency generator) at right angles to the static field.…”

Section: Introductionmentioning

confidence: 99%

Apparatus for investigating resonance with application to magnetic resonance imaging

Murphy

Jones

Gross

et al. 2015

American Journal of Physics

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Resonance is typically studied in the context of either a pendulum or a mass on a spring. We have developed an apparatus that enables beginning students to investigate resonant behavior of changing magnetic fields, in addition to the properties of the magnetic field due to a wire and the superposition of magnetic fields. In this resonant system, a compass oscillates at a frequency determined by the compass's physical properties and an external magnetic field. While the analysis is mathematically similar to that of the pendulum, this apparatus has an advantage that the magnetic field is easily controlled, while it is difficult to control the strength of gravity. This apparatus has been incorporated into a teaching module on magnetic resonance imaging.

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confidence: 99%

A purely mechanical forced oscillation system

Ong¹

1972

Phys. Educ.

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The study of forced oscillation and its related resonance phenomena is of importance in many engineering designs (Cannon 1967, Bishop 1965, and numerous teaching experiments on this subject have already been reported (Burge 1967, McLeod 1969, McInally 1969. All these experiments are, however, either purely or partly electrical, and none as yet is purely mechanical. The obvious reasons are that electrical oscillations may be easily controlled both in frequency and in amplitude while at the same time the required damping agent may be conveniently derived from the magnetic effects on a moving conductor.The experiment to be described here is a very instructive purely mechanical system consisting of a heavy and a light pendulum coupled together with a soft spring. The simple design is within the means of any school laboratory. Unlike electrical methods the oscillations of the pendulums are visual so that students may obtain a better insight into the mechanism of resonance by seeing for themselves the slowly changing pattern of the oscillatory motion. An added advantage is the possibility of studying the power factor of the system which is so important in engineering applications but which cannot be conveniently investigated with electrical systems.

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Some demonstrations of resonance phenomena in mechanical systems

Cited by 4 publications

References 0 publications

Manually driven harmonic oscillator

Manually driven harmonic oscillator

Apparatus for investigating resonance with application to magnetic resonance imaging

A purely mechanical forced oscillation system

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