Drag the pendulum to the height you want to drop it at and the release! Try experimenting with other values or values not given as sliders. Hover over the corners of the screen to access values or, press "d" to access the full menu without having to hover over each corner of the screen. Btw, String Length is from the Pivot point, to the center of the ball / weight The ball size doesn't do anything... Its the Damp Value that slows down the swinging Any visual glitches due to fencing don't affect the simulation. Use Turbowarp to fix the visual bugs. https://turbowarp.org/1232331486 Credits: My dad - Explaining literally all the math to me Google Gemini - Giving formulas which sometimes helped. Inspiration: Google's "Learning the Quadratic Equation" doodle (Kind of off-topic lol)