School of Physics Lecture Demonstration Manual

Wd-2 Forced Harmonic Motion (1)

Published: Wednesday 15 March 2006 - Updated: Wednesday 30 March 2011

Aim

To demonstrate the large amplitude oscillations of a body at resonance.

Apparatus

PASCO TM Motor Driven Oscillator

Diagrams

Click on pictures to enlarge.

Forced Harmonic Motion PASCO

FHM Diagram

Videos

Forced Harmonic Motion PASCO

Description

The apparatus consists of a spring connected via a light string to a motor driven oscillator. At resonance the amplitude increases uncontrollably. It is also possible to observe the phase relationship between the driving force and the spring as the system passes through resonance.

Safety notes

Electrical safety 

Maintenance 

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