I never found memorizing physics formulas to solve silly problems about cars driving up hills and slipping on ice particularly compelling. What is cool is adapting these formulas and using them in code to make physics simulations. I can’t recommend the book The Nature of Code enough for learning how to turn physics formulas into observable examples. I’ve been using the wonderful Codea app on my iPad to write all the simulations. The examples in the book are written in Processing and Codea uses Lua so a little conversion needs to be done.