As Seis Máquinas Simples: Funcionamento e Vantagem Mecânica

Section role: supports the 'A Ciência por Trás das Seis Máquinas Simples' section while the teacher explains the mechanical operation of each simple machine and the concept of mechanical advantage. Slides: (1) Title — 'As Seis Máquinas Simples e a Vantagem Mecânica'; (2) Alavanca — bullets: definition of components including fulcrum, effort force, and resistance force, with examples like a seesaw and scissors; (3) Plano Inclinado — bullets: how ramps increase distance to reduce necessary force, building directly on the primitive pyramid discussion from Section 1; (4) Polia (Roldana) — bullets: contrasting fixed pulleys that change direction with movable pulleys that divide weight; (5) Roda e Eixo, Cunha e Parafuso — bullets: door handles, wedges like axes for splitting objects, and screws as wrapped inclined planes; (6) Vantagem Mecânica — bullets: definition as the ratio of output force to input force, clarifying that machines do not create energy; (7) Verificação de Aprendizagem — bullets: prompt question 'Se eu usar uma rampa mais longa para subir um móvel, eu farei mais ou menos força?'. Closing slide: 'Qual destas seis máquinas você utiliza com mais frequência no seu dia a dia?' — sets up the classification activity in Section 3.