# NTNUJAVA Virtual Physics LaboratoryEnjoy 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 March 14, 2009, 06:06:48 pm

 Title: Pendulum wave Post by: Fu-Kwun Hwang on March 14, 2009, 06:06:48 pm 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.)[ejsapplet]Check out youtube movie for pendulum wave[youtube=7_AiV12XBbI]and[youtube=OJCT9FbUf3g] Title: Re: Pendulum wave Post by: khalifah5 on March 29, 2009, 11:59:48 am 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? Title: Re: Pendulum wave Post by: Fu-Kwun Hwang on March 29, 2009, 01:56:34 pm The period of the pendulum $T=2\pi \sqrt{L/g}$ 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. Title: Re: Pendulum wave Post by: JacobHenry on October 01, 2013, 02:04:10 am Quote from: Fu-Kwun Hwang on March 14, 2009, 06:06:48 pmThe 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? Title: Re: Pendulum wave Post by: Fu-Kwun Hwang on October 01, 2013, 10:33:42 pm 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. :D Title: Re: Pendulum wave Post by: JacobHenry on October 04, 2013, 06:17:05 am Quote from: Fu-Kwun Hwang on October 01, 2013, 10:33:42 pmIt 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 (http://www.luxetranslation.com) 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.:DThank you so much. I updated to latest Java and it is working now. Title: Re: Pendulum wave Post by: Normaz on December 15, 2015, 06:29:30 pm 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-*-.