PendulumJava
Applet
simplify version
How to change parameters?
- Set the initial position
Click and drag the left
mouse button
- Adjust the length
- Change gravity g
- Change the mass of the bob
- The horizontal position of the pendulum will follow the mouse Animation
starts when you release the mouse button
dragging the pointer (while > holding down the left button)
- from the support-point (red dot) to a
position that sets the length you want.
Click near the tip of the red arrow,
- and drag the mouse button to change it (up-down).
Click near the buttom of the black stick,
- and drag the mouse button to change it (up-down).
- 1. red dots: kinetic energy K = m v*v /2 of
the bob 2. blue dots: potential energy U = m g h
of
the bob
Try ro find out the relation between kinetic
energy and pontential energy! 3.black dots (pair) represent
the peroid T of the pendulum
- move the mouse to the dot :
- will display information for that dot in the textfield
- 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.
- You can produce a period verses angle ( T - X
) curve on the screen,just started at different positions and wait for
a few second.
Any suggestions! Please click hwang@phy03.phy.ntnu.edu.twCheck out other physics java applets
Last modified :
URLs link to this page
- http://www.dalton.org/groups/astro/physics/physics.html
- http://www.west.it/ensites/pja.htm
- http://www.kauhajoki.fi/lukio/hypeti/fysiikka.html
- http://didaktik.physik.uni-wuerzburg.de/~pkrahmer/home/java1.html
- http://www.avmz.uni-siegen.de/~volker/projects/PfI/W3-short/samples.html
- http://heart.engr.csulb.edu/~rtoossi/physics/demos.html#energy
- http://cccsrv.trevano.ch/physics.html
- http://didaktik.physik.uni-wuerzburg.de/~pkrahmer/home/java1.html
- http://www.df.uba.ar/~dgomez/mec/links.html
- http://www.cyberschool.co.za/science/wenpo.htm
