torsional wave

[ahmedelshfie]

This applet created by Prof Hwang
Modified by myself
Original project:torsional wave

Embed a running copy of this simulation
<applet code='users.br.ahmed.users_ntnu_fkh_pendulumsetup_pkg.users_ntnu_fkh_pendulumsetupApplet.class' archive='http://www.phy.ntnu.edu.tw/ntnujava/ejsuser/37048/ejs_users_ntnu_fkh_pendulumsetup.jar' name='users_ntnu_fkh_pendulumsetup5833' id='users_ntnu_fkh_pendulumsetup5833' width='700' height='640' mayscript=true><param name='draggable' value='true'></applet>
Embed a running copy link(show simulation in a popuped window)
<a href='http://www.phy.ntnu.edu.tw/ntnujava/msg.php?smfejs=5833' target='smfejs'>Run simulation</a>

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Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License

• Please feel free to post your ideas about how to use the simulation for better teaching and learning.
• Post questions to be asked to help students to think, to explore.
• Upload worksheets as attached files to share with more users.

Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!

[ahmedelshfie]

This experiment consists of a metal grill that can be twisted to create torsion waves. The waves will reflect off the far end of the grill in either a free or fixed end fashion but the difference is difficult to see unless the students know what to look for exactly.
Image from http://www.phys.ufl.edu/demo/3_OscillationsWaves/B_WaveMotion/FreeFixedTorsionWaves.html

[Fu-Kwun Hwang]

The original version was created to simulate a real device.

Please check out New version of torsional wave if you want to simulatate the above demo.

[ahmedelshfie]

Here is another version of torsional wave (demostration)

Change the c angle with slider and watch how wave propagate.
The slider for i can be used to change angle for i-th element.

The force acting on each element is
F_i= K* c_i + K_ij * (c_{i+1}-c_i)+K_ij (c_i-c_{i-1})-b*\omega_i
where c_i is the i-th angle, \omega_i is the angular velocity, b is damping constant, K_ij represent interaction between elements.
Original New version of torsional wave

Embed a running copy of this simulation
<applet code='users.br.ahmed.users_ntnu_fkh_torsionalwavedemo_pkg.users_ntnu_fkh_torsionalwavedemoApplet.class' archive='http://www.phy.ntnu.edu.tw/ntnujava/ejsuser/37048/ejs_users_ntnu_fkh_torsionalwavedemo.jar' name='users_ntnu_fkh_torsionalwavedemo5905' id='users_ntnu_fkh_torsionalwavedemo5905' width='587' height='597' mayscript=true><param name='draggable' value='true'></applet>
Embed a running copy link(show simulation in a popuped window)
<a href='http://www.phy.ntnu.edu.tw/ntnujava/msg.php?smfejs=5905' target='smfejs'>Run simulation</a>

Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License

• Please feel free to post your ideas about how to use the simulation for better teaching and learning.
• Post questions to be asked to help students to think, to explore.
• Upload worksheets as attached files to share with more users.

Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!