https://www.khanacademy.org/science/ap-physics-c-mechanics/x077f5683c1428fac:force-and-translational-dynamics 2026-06-30T04:10:47.863261627Z Force and translational dynamics Forces arise from interactions between two objects or systems of objects. Use free body diagrams and motion models to analyze the effects of forces on systems. Learn about gravitational, spring, friction, and resistive forces. Apply force and motion concepts to objects in circular motion. Practice deriving equations from fundamental principles and use proportional reasoning to make predictions. unit