A <i>g</i> measurement proposal inspired by a textbook problem from professor Moysés Nussenzveig

Bezerra, A.B.; Barros, R.F.E.; Bessa, A.; Lisboa, R.; Ferreira, P.C.

doi:10.1590/1806-9126-RBEF-2023-0075

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Artigos Gerais • Rev. Bras. Ensino Fís. 45 • 2023 • https://doi.org/10.1590/1806-9126-RBEF-2023-0075 linkcopy

A g measurement proposal inspired by a textbook problem from professor Moysés Nussenzveig

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Abstract

Determining the free fall acceleration is a common practice in Physics didactic laboratories. In this work, we present an experimental proposal to measure the acceleration of gravity based on an problem from professor Moysés Nussenzveig’s Mechanics textbook. This determination is carried out using the movement of a glider on an inclined air track, and has discrepancy of the order of 0.5%.

Keywords:
Experimental physics; mechanics; free fall acceleration; photogate

Config.	z (m)	$\bar{g} \pm σ_{\bar{g}}$ (m/s²)	$δ_{g} = \| \bar{g} - 9,78 \| / 9,78$
1	0,20	9,837 $\pm$ 0,002	0,58%
2	0,30	9,842 $\pm$ 0,002	0,63%
3	0,40	9,837 $\pm$ 0,001	0,59%
4	0,50	9,831 $\pm$ 0,001	0,52%
5	0,60	9,826 $\pm$ 0,001	0,47%
6	0,70	9,819 $\pm$ 0,001	0,40%
7	0,80	9,823 $\pm$ 0,001	0,44%
8	0,90	9,818 $\pm$ 0,002	0,39%
9	1,00	9,826 $\pm$ 0,002	0,47%
10	1,10	9,827 $\pm$ 0,002	0,48%

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Sociedade Brasileira de Física - SBF Rua do Matão, travessa R, 187 - Edifício Sede - Cidade Universitária, São Paulo, SP, Brasil, CEP 05508-090, Tel: +55 (11) 3034-0429 - São Paulo - SP - Brazil
E-mail: rbef@sbfisica.org.br, marcellof@unb.br

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