Measurement of <inline-formula><mml:math display="inline" id="m2"><mml:mi>g</mml:mi></mml:math></inline-formula> with an Arduino microcontroller in a simple free fall experiment

Cordova, H.; Tort, A. C.

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Revista Brasileira de Ensino de Física

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Artigos Gerais • Rev. Bras. Ensino Fís. 38 (2) • June 2016 • https://doi.org/10.1590/1806-9126-RBEF-2015-0012 copy

Measurement of $g$ with an Arduino microcontroller in a simple free fall experiment

Authorship SCIMAGO INSTITUTIONS RANKINGS

A simple way of measuring the terrestrial acceleration $g$ in the basic lab that makes use of the Arduino microcontroller is proposed. Experimental results with a relative error of $0, 1 %$ were obtained and compared with the local value of $g$ as measured by the Brazilian National Observatory at Rio de Janeiro.

Keywords:
gravitational accleration; free fall; Arduino

Med.	$t_{i}$ (s)	Med.	$t_{i}$ (s)	Med.	$t_{i}$ (s)
1	$0, 439$	8	$0, 439$	15	$0, 439$
2	$0, 439$	9	$0, 439$	16	$0, 439$
3	$0, 440$	10	$0, 440$	17	$0, 439$
4	$0, 439$	11	$0, 439$	18	$0, 439$
5	$0, 439$	12	$0, 440$	19	$0, 439$
6	$0, 439$	13	$0, 440$	20	$0, 439$
7	$0, 438$	14	$0, 440$	21	$0, 439$

Med.	${\bar{g}}_{i}$ (m/s $^{2}$ )	Med.	${\bar{g}}_{i}$ (m/s $^{2}$ )	Med.	${\bar{g}}_{i}$ (m/s $^{2}$ )
1	$9, 786$	8	$9, 786$	15	$9, 786$
2	$9, 786$	9	$9, 786$	16	$9, 786$
3	$9, 742$	10	$9, 742$	17	$9, 786$
4	$9, 786$	11	$9, 786$	18	$9, 786$
5	$9, 786$	12	$9, 742$	19	$9, 786$
6	$9, 786$	13	$9, 742$	20	$9, 786$
7	$9, 831$	14	$9, 742$	21	$9, 786$

Sociedade Brasileira de Física Caixa Postal 66328, 05389-970 São Paulo SP - Brazil - São Paulo - SP - Brazil
E-mail: marcio@sbfisica.org.br

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[1] *Endereço de correspondência: tort@if.ufrj.br.

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Measurement of g with an Arduino microcontroller in a simple free fall experiment

Measurement of $g$ with an Arduino microcontroller in a simple free fall experiment