2018
DOI: 10.1590/1806-9126-rbef-2017-0305
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Abstract: Apresentamos o conceito de um transporte gravitacional como ilustração a um curso introdutório de gravitação. Dois pontos quaisquer da crosta terrestre, a despeito das dificuldades tecnológicas envolvidas, poderiam ser ligados por um túnel através do qual um veículo cairia em queda livre, fazendo uso apenas e tão somente da energia potencial gravitacional. Essa energia disponível está armazenada no campo gravitacional devidoà distribuição de massa da Terra. Aperfeiçoamos os cálculos já existentes utilizando di… Show more

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Cited by 2 publications
(1 citation statement)
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“…With respect to Earth, with a more accurate analysis of the dashed curve given in the Fig. 4b, we find that the motion in the first 13.5 minutes is characterized by an approximately constant acceleration, around 10 m/s 2 , and then during the remaining 5.6 minutes, the acceleration drops gradually until it reaches zero in the center of the Earth [20]. This result confirms what is advocated in the reference [4], which states that an Earth model based on constant acceleration is more realistic than that which is addressed in didactic literature in that the authors treat a planet as if it had constant density (SHM).…”
Section: Comparing the Different Modelsmentioning
confidence: 76%
“…With respect to Earth, with a more accurate analysis of the dashed curve given in the Fig. 4b, we find that the motion in the first 13.5 minutes is characterized by an approximately constant acceleration, around 10 m/s 2 , and then during the remaining 5.6 minutes, the acceleration drops gradually until it reaches zero in the center of the Earth [20]. This result confirms what is advocated in the reference [4], which states that an Earth model based on constant acceleration is more realistic than that which is addressed in didactic literature in that the authors treat a planet as if it had constant density (SHM).…”
Section: Comparing the Different Modelsmentioning
confidence: 76%