Fontes

• https://www.infoescola.com/mecanica/polias-roldanas/
• http://polemicascmm.blogspot.com/2012/11/tipos-de-alavancas.html
• https://www.sofisica.com.br/conteudos/Mecanica/Dinamica/leisdenewton.php
• http://www.fisica.net/mecanicaclassica/maquinas_simples_alavancas.php
• https://www.radian.com.hk/simulations/index.html#/list

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