PendulumJava Applet
simplify version


Your browser can't run 1.0 Java applets, so here's a picture of the window the program brings up:

How to change parameters?

    Set the initial position Click and drag the left mouse button
      The horizontal position of the pendulum will follow the mouse Animation starts when you release the mouse button
  1. Adjust the length

  2. dragging the pointer (while > holding down the left button)
      from the support-point (red dot) to a position that sets the length you want.
    Animation starts when you release the mouse button
  3. Change gravity g

  4. Click near the tip of the red arrow,
      and drag the mouse button to change it (up-down).
  5. Change the mass of the bob

  6. Click near the buttom of the black stick,
      and drag the mouse button to change it (up-down).
Information displayed: Click show checkbox to show more information
    blue arrow(1): gravity green arrows(2): components of gravity red arrow (1): velocity of the bob Try to compare velocity and the tangential component of the gravitional force!

The calculation is in real time (use Runge-Kutta 4th order method). The period(T) is calculated when the velocity change direction.
Any suggestions! Please click hwang@phy03.phy.ntnu.edu.twCheck out other physics java applets
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URLs link to this page
  1. http://www.tp.umu.se/TIPTOP/vlab/
  2. http://www.dalton.org/groups/astro/physics/physics.html
  3. http://cnr2.kent.edu/~johnson/physical/ch3.html
  4. http://www.west.it/ensites/pja.htm
  5. http://www.htk.fi:80/kirjasto/matema.htm#fysiikka
  6. http://www.kauhajoki.fi/lukio/hypeti/fysiikka.html
  7. http://didaktik.physik.uni-wuerzburg.de/~pSchulphysik/home/java1.html
  8. http://www.avmz.uni-siegen.de/~volker/projects/PfI/W3-short/samples.html
  9. http://ourworld.compuserve.com/homepages/Peter_Schulphysik/java1.htm
  10. http://heart.engr.csulb.edu/~rtoossi/physics/demos.html#energy
  11. http://cccsrv.trevano.ch/physics.html
  12. http://didaktik.physik.uni-wuerzburg.de/~pSchulphysik/home/java1.html
  13. http://www.geocities.com/CapeCanaveral/4310/java1.htm
  14. http://www3.sympatico.ca/cmichael/intro/index2.htm
  15. http://www.df.uba.ar/~dgomez/mec/links.html
  16. http://www.cyberschool.co.za/science/wenpo.htm