It might seem surprising that a particle moving

Conservation of angular momentum L = r X m v Kepler's second law states: Does a free particle moving in a straight lines Press start to start the animation, and let the show begin


A black dot will move freely from left to right.

Do all the areas have the same size?

Click within each area and see what will happen.

Certainly, from mathematics equation, we know



Another angular montum conserved simulation


The following is another applets show two mass object attracted to each other by gravitation force.
The gravitation force does not change angular momentum.

/htdocs/ntnujava/ejsuser/2/users/ntnu/fkh/twostarsequalarea_pkg/twostarsequalarea.propertiesFull 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
Download EJS jar file(1267.7kB):double click downloaded file to run it. (29 times by 20 users) , Download EJS source (14 times by 9 users) View EJS source