hi guys, i am an 11th grade student who loves physics and i have been doing lots of advanced problems from books like irodov,etc. I recently came across something called mathmatical modelling via differential equations. And my teacher once mentioned that u can solve most of problems of mechanics via placing the system on a coordinate system and then writing differential equations and stuff like that. Is it true??? Can u solve problems of collisions??? Is this a part of mathematical modelling??? I want to learn more about the use of coordiate geometry in physics especially mechanics. Please help.