Physics Ninja looks at the dynamics of a 2d tetherball. A mass is attached to a string and wraps around a post. The equations of motion are derived using Newton's Laws and Euler-Lagrange equations. Python code: https://drive.google.com/file/d/1vWrPu2QxQw6ZHRSSu9brCRkJFBcVVEn7/view?usp=drive_link Visit my Etsy store and support Physics Ninja: https://physicsninja.etsy.com