This simulation illustrates Kepler's Second Law, that orbits sweep out equal areas during equal intervals of time, for any part of the orbit. The user can choose from three buttons between circular or increasingly elliptical orbits to observe that the law holds in all cases.
M. Fowler and H. Welch, Physics Flashlets: Kepler's Laws (2003), WWW Document, (http://galileo.phys.virginia.edu/classes/109N/more_stuff/flashlets/morekep.html).
Fowler, M., & Welch, H. (2007, June 25). Physics Flashlets: Kepler's Laws. Retrieved June 19, 2013, from http://galileo.phys.virginia.edu/classes/109N/more_stuff/flashlets/morekep.html
%0 Electronic Source %A Fowler, Michael %A Welch, Heather %D June 25, 2007 %T Physics Flashlets: Kepler's Laws %V 2013 %N 19 June 2013 %8 June 25, 2007 %9 application/flash %U http://galileo.phys.virginia.edu/classes/109N/more_stuff/flashlets/morekep.html
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