2DAge 7+10 min
A lever: a child lifts a heavy stone
A 20 kg load on the long arm lifts a 50 kg stone when the fulcrum is close to the stone. With the fulcrum in the middle the stone stays put.
Projects gallery
Physics experiments
Interactive experiments for kids, students and teachers. Run each one right on the page, then open a copy in the Tymora editor and change mass, friction, elasticity or gravity. Every experiment comes with discussion questions and a version to try at home.