Relating to the motion of objects through space and time. Including concepts such as acceleration (thrust and gravity), mass, collision response, friction and more.

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How to use a physics engine for collision detection? [closed]

I want to use Box2D.XNA or Farseer for collision detection in my 2D game, but I don't know how to start. I added Box2D.XNA to my solution, but I don't know how to create rectangles, circles or ...
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two balls stick together in a pool game? [closed]

when multiple collisions occur between balls..sometimes they stick together..mostly in cases of either of the balls having high velocity..can somebody explain pls