Hi everyone ! I present myself : I come from belgium,I'm librarian. I join you because, I need help for a little calculation*. It's about physics (newton's law application) , I have searched over the web for a french forum but, it's always good to have different point of view and to practice a little my very bad english**. So, I'll post my little question on the good section and I think I will participate in the sci-fi section. Regards, Max. * If I find the correct section of the forum. **Feel free to correct me !