Indonesia Conference Directory

<< Back

Determination of earths gravitational acceleration and moment of inertia of rigid body using physical pendulum experiments
Nani Yuningsih (a), Sardjito (b), Yunita Citra Dewi (c)

a)Jurusan Teknik Refrigerasi dan Tata Udara, Politeknik Negeri Bandung,
Jl. Gegerkalong Hilir Kotak Pos 1234 Bandung 40012
b)Jurusan Teknik Elektro, Politeknik Negeri Bandung, Jl. Gegerkalong Hilir
Kotak Pos 1234 Bandung 40012
c)Jurusan Teknik Mesin, Politeknik Negeri Bandung, Jl. Gegerkalong Hilir
Kotak Pos 1234 Bandung 40012


In order to determine the value of Earth-s gravity acceleration, Physical pendulum experiment is preferred over simple pendulum experiment. Through the Physical Pendulum experiment, we measure the swing time and swing rod position. Using this data to the motion-s law, it can be determined equations involving constants that implicitly contain value of the Earths gravity acceleration as well as the moment of inertia with pivot point located at the center of mass. Independent variable of the equation is the distance of pivot point to center of mass and dependent variable is period of pendulum. Difficulties in solving equations are encountered because of a part of the equation involving independent variable in the different ranks. In order to make the equation be linear, dependent and independent variables is made into new emerging variables. Afterwards, with linear regression methods, the constants of these equations can be determined, and then we can calculate the value of Earths gravity acceleration and moment of inertia. The experiment results showed considerable significance when compared to the Earth gravity acceleration from the literature, as well as the value of moment inertia calculated by calculus. Comparison of these products showed satisfying results with a relative error value smaller than 5%.

Keywords: Physical pendulum, earth-s gravity acceleration, moment of inertia, linear regression

Topic: Basic Science in Engineering Education


Conference: The Third International Conference on Innovation in Engineering and Vocational Education (ICIEVE 2019)

Plain Format | Corresponding Author (Nani Yuningsih)

Featured Events

<< Swipe >>
<< Swipe >>

Embed Logo

If your conference is listed in our system, please put our logo somewhere in your website. Simply copy-paste the HTML code below to your website (ask your web admin):

<a target="_blank" href=""><img src="" title="Ifory - Indonesia Conference Directory" width="150" height="" border="0"></a>

Site Stats