Swinging metal ballsUploader: Mohamed 12 days ago Subscribe 886
American Journal of Physics. Once it starts, it will keep moving until you stop it. When one of the end balls "the first" is pulled sideways, the attached string makes it follow an upward arc. Another use is as an educational physics demonstration, as an example of conservation of momentum and conservation of energy. There are slight movements in all the balls after the initial strike but the last ball receives most of the initial energy from the drop of the first ball. Baoblaze 10xpcs Chenille Stems Pi.