Corpos no interior de um recipiente fechado e transparente em queda livre

TL;DR

This paper presents an accessible, simple experimental demonstration of the independence of falling bodies' properties, using a transparent bottle with a feather and a stone, suitable for educational settings.

Contribution

Introduces a new, easy-to-reproduce experiment demonstrating free fall independence without vacuum, ideal for classroom use.

Findings

Feather and stone fall simultaneously in the experiment

No vacuum needed, making it accessible for educational environments

Confirms the independence of mass and shape in free fall

Abstract

Neste artigo discutimos uma nova demonstracao experimental da independencia das propriedades dos corpos (massa, composicao quimica, forma, etc.) na queda livre. Eh uma das experiencias mais simples, porem uma das mais importantes da Mecanica, tendo sido realizada e repensada repetidamente por diversos cientistas tais como Galileu e Newton. Nossa versao eh introduzir dentro de uma garrafa fechada e transparente uma pena e uma pedra observando a queda simultanea destes corpos. Por nao haver a necessidade de produzir vacuo, esta versao pode ser repetida por qualquer aluno e professor de ensino medio e universitario em qualquer ambiente, evidenciando sua viabilidade e aplicabilidade na sala de aula. English version of abstract: In this paper we discuss a new experimental demonstration of the independence of the properties of bodies (mass, chemical composition, shape, etc) in free fall. This is one of the simplest experiments in mechanics, though one of the most important ones, having been repeatedly carried out and rethought by several scientists such as Galileo and Newton. Our version of this famous experiment uses one bottle (closed and transparent), in which we introduce a feather and a stone, observing the simultaneous free fall of these bodies. Because it is not necessary to create vacuum, this version can be repeated by teachers and students alike either in secondary schools or universities in any environment. Thus its viability and applicability in the classroom is evident.