2DAge 6+10 min
Wheel versus sled: why a cart is easier
A sled and a cart get the same push. The sled quickly stops while the wheeled cart rolls much farther.
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.