NTNUJAVA Virtual Physics Laboratory
Enjoy the fun of physics with simulations!
Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/

Easy Java Simulations (2001- ) => Dynamics => Topic started by: Fu-Kwun Hwang on April 24, 2010, 02:48:14 pm



Title: Driven pendulum (forced oscillation)
Post by: Fu-Kwun Hwang on April 24, 2010, 02:48:14 pm
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.