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Al Tobias (wat4y) - Office: Gibson S123 & Physics 218, (434) 924-0538

Physics Demo Manual

Demonstrations are cataloged according to PIRA Bibliography


Due to Physics Building renovations, the lead time to set up demo requests has increased due to the need to transport equipment across campus. Please be kind and let me know well ahead of time what you need.

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 Harmonic Motion
  video  - Pendula, Spring and Simple
 Pendula, Conical and Torsional
  video  - Pendula, Physical (Center of Percussion)
 Projected Uniform Circular Motion
 Damped Mass on Spring
  video  - Forced Oscillations
 Hacksaw Blade Resonance
  video  - Resonance Wire Ring
  video  - Inverted Pendulum - Function Generator
 Inverted Pendulum - Reciprocating Saw
 Coupled Pendulum Oscillators
 Coupled Magnetic Oscillations
 Coupled Harmonic Oscillators
 Lissajous Figures on the Scope
 Lissajous Fifures with Laser
 Parametric Amplifier / Oscillator

Pendula, Conical and Torsional


These pendula demonstrations are not as straight - forward as the simple and spring pendula. For example, finding the torsional constant, K, of the rod, takes time and is really not feasible in the classroom. It is much easier to measure T and calculate the torsional constant. Measuring the angle of a conical pendulum is slightly difficult whereas measuring T and calculating 0 is much easier.


  • Timer
  • Meter Stick
  • Simple Pendulum
  • Stand
  • Support Rod
  • Torsional disc