Wonderful CoG cones

thingiverse

These cones roll UPHILL! See https://youtu.be/da5RdDmNDv4 What's behind it? It's all about physics - a lesson on CoG (Center of Gravity). Each piece is made in two parts, printing them onto a 6" x 6" print bed. Print two copies of the cone and cylinder, then join them with glue or my go-to method: touching them with a low heat soldering iron. No tricks involved here! The white cylinder naturally rolls downhill on its own, while the joined cones roll effortlessly uphill without any push. No weights, magnets, or strings are needed to make it work.