Ensino Fundamental::Séries Finais::Ciências NaturaisEnsino Fundamental Inicial::Ciências NaturaisThis activity proposes to balance 15 nails on the head of one nail. Nails can be balanced across the first nail if their weight is evenly distributed and if they can be stopped from slipping off. A nail on top will push against the heads of the balancing nails, and as gravity pulls them down this will hold them more tightly in place