Rolling Friction Carts - Set of 4, 1 Set

The United Scientific® Rolling Friction Carts - Set of 4 by United Scientific is a physics teaching set of four equal-mass carts whose wheels are made of soft silicone, soft rubber, wood and fabric. Free-rolling wheels show rolling friction without slipping, so differences in travel come from wheel material. Each 5.25″ cart has a well for added mass. Used in middle and high school force and motion labs.