Pendulum wave

[Fu-Kwun Hwang]

The following applet simulated a famous pendulum wave.
The length of each pendulum is different so that the frequency of each pendulum is different by a fixed amount.
The frequency of the first one f1 and the difference between near by pendulum can be adjusted by slider.
Because the frequency is too faster to be observed by our eye, so the simulation show slow motion of the real wave by a factor of 100. (You can change time scale,too. Drag the slider to the right to make it faster.)

Embed a running copy of this simulation
<applet code='users.ntnu.fkh.pendulumwave_pkg.pendulumwaveApplet.class' archive='http://www.phy.ntnu.edu.tw/ntnujava/ejsuser/2/ejs_pendulumwave.jar' name='pendulumwave3797' id='pendulumwave3797' width='582' height='586' 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=3797' 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!

Check out youtube movie for pendulum wave

http://www.youtube.com/watch?v=7_AiV12XBbI

and

http://www.youtube.com/watch?v=OJCT9FbUf3g

[khalifah5]

i want to ask you about the pendulum. How would the period of a simple pendulum be affected if it was located on the moon instead of the earth?

[Fu-Kwun Hwang]

The period of the pendulum where L is the length of the pendulum and g is the gravity.　(inversely proportional to square root of gravity)

You should be able to answer your question from the above information if you know how the gravity on the moon compared to gravity on the earth.

[JacobHenry]

The following applet simulated a famous pendulum wave.
The length of each pendulum is different so that the frequency of each pendulum is different by a fixed amount.
The frequency of the first one f1 and the difference between near by pendulum can be adjusted by slider.
Because the frequency is too faster to be observed by our eye, so the simulation show slow motion of the real wave by a factor of 100. (You can change time scale,too. Drag the slider to the right to make it faster.)

Hello,

I want to view the first applet for my physics class, but it doesn't work. It says the plugin is not supported and it just shows me a gray screen. Do you know how I can fix this?

[Fu-Kwun Hwang]

It is a problem due to Java. You need to update to latest java version. (Go to  http://java.com/download/index.jsp , download/install latest version).

You need to close browser while update the java.

Re-open browser and load the page again, allow the program to run, and it should work fine.

 

[JacobHenry]

It is a problem due to Java. You need to update to latest java version. (Go to http://java.com/download/index.jsp , download/install latest version).

You need to close browser while update the java.

Re-open browser and load the page again, allow the program to run, and it should work fine.

Thank you so much. I updated to latest Java and it is working now.

[Normaz]

The Pendulum Wave is a device that provides such an opportunity. It consists of a series of pendulum with increasing periods that when simultaneously released, produce the effect of a changing transverse wave that cycles back to the -*-beginning conditions-*-.