Berceau Newton bi

Berceau Newton bi, walla pendul Newton bi, mooy jumtukaay bu wone nàngu mbir yi ñeel mouvement ak conservation d'énergie. Dafa ame ay boule metal yu bokk ci ab seen, yu ñu jël seen tëj. Bu ñu jël benn boule te weesu ko, dana dàkk ci yeneen yi, di jox seen énergie ci seen biir, loolu dana def ba boule bu nekk ci bunt bu wet wi di yëngu di wéy. Jumtukaay bii bu yomb te wone bu baax, dafa won ni mouvement ak énergie di wuññiku diggante lu bokk.