This applet created by Prof Hwang
Modified by Ahmed
Original project [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1597]Driven pendulum (forced oscillation)[/url]

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.

/htdocs/ntnujava/ejsuser/37048/users/br/ahmed/users_ntnu_fkh_drivenpendulum_pkg/users_ntnu_fkh_drivenpendulum.propertiesFull screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list