https://www.dotnetzone.gr:443/cs/blogs/iwannis/archive/2011/02/08/xna-for-windows-phone-7-and-physics.aspxIn this post, we will see how easy it is to create an XNA world for Windows Phone 7 that obeys the laws of physics. To our quest, our weapon will be the Farseer physics engine. You will be amazed when you realize how interesting a simple circle on theelCommunityServer 2.1 SP3 (Build: 20423.1)