To find out how the experimental apparatus works, please click this link: https://www.pasco.com/prodCompare/classic-dynamics-carts/index.cfm

Please follow these links for short demos.

1) Explosion:  https://youtu.be/HYRyWWw57Pg

2) Elastic collision: https://youtu.be/40yaB-n-Feo and https://youtu.be/RhKmAOxG3AA

3) Inelastic collision:  https://youtu.be/6eABJ5xpG0s