2d game physics?

Question

Can anyone point me to a library for 2D game physics, etc for programming gravity, jumping actions, etc for a 2d platform/sidescrolling game ? Or could you suggest some algo

Answer 1

To answer the second part of your question, if you want to get a handle on how a simple 2D platformer works, take a read through the tutorials for N. Yes, N is a flash-based game but that doesn't mean it isn't constructed like a "real" game, so the collision detection (and response) tutorials are very much applicable. They're a straightforward read with some intuitive demos embedded in the page to show off the geometric concepts.