Use these carts when you want to demonstrate resolution of forces, acceleration down a plane, work and potential energy, and friction.
Related Demos
Tips
Put cart with a string on the inclined plane with a pulley. Hang weights on the string over the pulley so the system is in static equilibrium. Add mass to the cart until it begins to slide down the incline; the frictional force must be in the upward direction. Hang an additional weight on the string over the pulley until the cart begins to slide up the incline; the frictional force must be in the downward direction.