About
an open source physics at Singapore simulation based on codes written by Andrew Duffy, Anne Cox, Wolfgang Christian, Francisco Esquembre and Loo Kang WEE.
more resources can be found here
http://iwant2study.org/ospsg/index.php/interactive-resources/physics/02-newtonian-mechanics/08-gravity

Introduction
Every object sets up a gravitational field around itself due to its mass. When two objects enter each other’s gravitational fields, they will be attracted to each other.
Hence, a gravitational field is a region of space in which any object that lies in it experiences a gravitational force towards the object that creates the field, due to its mass.
This Lab allows the inquiry of gravity concepts of field and potential for a two mass setup.

Interesting Fact
This app produces real numbers to coincident with the real world data.

Acknowledgment
My sincere gratitude for the tireless contributions of Francisco Esquembre, Fu-Kwun Hwang, Wolfgang Christian, Félix Jesús Garcia Clemente, Anne Cox, Andrew Duffy, Todd Timberlake and many more in the Open Source Physics community. I have designed much of the above based on their ideas and insights.
This research is supported by the eduLab project NRF2015-EDU001-EL021 , awarded by the Prime Minister Office, National Research Foundation (NRF), Singapore in collaboration with National Institute of Education (NIE), Singapore and the Ministry of Education (MOE), Singapore.
reference:
http://edulab.moe.edu.sg/edulab-programmes/existing-projects/nrf2015-edu001-el021

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Blog: http://weelookang.blogspot.sg/
Digital Library: http://iwant2study.org/ospsg/

2 Mass Gravity Virtual Lab