For anyone trying to master Force problems, this app is a must have. For any problem involving Newtons Second Law, a.k.a. F=ma, this app outlines 8 easy steps as a standard procedure to solve ANY problem. The app then outlines 4 common force examples using this step-by-step process. The app also lists common forces and components for common force situations such as free fall, a hanging mass, incline, and a flat surface (with friction). Finally, the app includes over 20 flash cards for all of the aforementioned scenarios. If you are a physics student encountering force problems for the first time, or a seasoned veteran looking to brush up, dont hesitate to grab this app. Good luck!