NTNUJAVA Virtual Physics Laboratory
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"It is not the strongest of the species that survive, but the one most responsive to change." ..."Darwin(1809-1882, English naturalist Evolution)"
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Author Topic: Driven pendulum (forced oscillation)  (Read 7094 times)
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Fu-Kwun Hwang
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on: April 24, 2010, 02:48:14 pm » posted from:Taipei,T\'ai-pei,Taiwan

There are three springs all driven by external force with different frequency.
The resonance frequency is determined by \omega_0=\sqrt{k/m} where k is the spring constant, m is the mass (k,m can be adjusted with slider). 
When sync check box is checked:
The driven frequency for left spring is ratio*w_0,
The driven frequency for center spring is w_0,
The driven frequency for right spring is ratio/w_0.

You can find the phase between oscillation and external force.
A damping force is introduced to prevent the amplitude become infinity.

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