this simulates friction and momentum. mass=how much it weighs. if it weighs more it will be harder to accelerate. friction coefficient= how much the two surfaces slow each other down. a list and explanation is here:http://www.engineeringtoolbox.com/friction-coefficients-d_778.html acceleration= how hard it is being pushed on. momentum=how much energy it contains. For instance, if one moving ball hit a stationary ball and the moving ball stopped, the stationary ball would continue at the momentum speed. aforce=how much it takes to move an object.I isn't very accurate, i still haven't found a good formula.
