I wanna make a suggestion for the homework section. I am sure you all have noticed that the same questions come back and back every time. This is why i am willing to write down a little text (and i am asking if others want to participate) that explains some of the most frequently asked questions. I am talking about questions like : 1) Everything that has to do with motion on inclines 2) Conservation of energy 3) Kinetic energy-work-theorem 4) applications of projectile motions and other two dimensional motions 5) Applications of friction and normal forces (again for the inclines) What do you think ? Most of these texts can easily be written and i am willing to do that. Perhaps we then can put everything in a sticky to which we can refer if such questions are again asked ??? Just a suggestion regards marlon edit : maybe we can also add some tests that people can solve ???